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Finding the Fourth Proportional to 520,073.70, 780,110.55 and 485,081.70

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Solution

The fourth proportional to 520,073.70, 780,110.55 and 485,081.70 is: 727,622.55

Step by Step Solution

  1. Step 1: Write the proportion equation
    520,073.70 : 780,110.55 = 485,081.70 : x
  2. Step 2: Convert to fraction form
    520,073.70/780,110.55 = 485,081.70/x
  3. Step 3: Cross multiply
    520,073.70x = 780,110.55 × 485,081.70
  4. Step 4: Simplify right side
    520,073.70x = 378,417,351,781.94
  5. Step 5: Solve for x
    x = 378,417,351,781.94/520,073.70
  6. Step 6: Final answer
    x = 727,622.55

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