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Finding the Fourth Proportional to 777,744.75, 1,073,288.16 and 420,048.75

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Solution

The fourth proportional to 777,744.75, 1,073,288.16 and 420,048.75 is: 579,667.49

Step by Step Solution

  1. Step 1: Write the proportion equation
    777,744.75 : 1,073,288.16 = 420,048.75 : x
  2. Step 2: Convert to fraction form
    777,744.75/1,073,288.16 = 420,048.75/x
  3. Step 3: Cross multiply
    777,744.75x = 1,073,288.16 × 420,048.75
  4. Step 4: Simplify right side
    777,744.75x = 450,833,349,997.80
  5. Step 5: Solve for x
    x = 450,833,349,997.80/777,744.75
  6. Step 6: Final answer
    x = 579,667.49

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