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Finding the Fourth Proportional to 420,077.76, 579,379.68 and 269,188.80

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Solution

The fourth proportional to 420,077.76, 579,379.68 and 269,188.80 is: 371,270.60

Step by Step Solution

  1. Step 1: Write the proportion equation
    420,077.76 : 579,379.68 = 269,188.80 : x
  2. Step 2: Convert to fraction form
    420,077.76/579,379.68 = 269,188.80/x
  3. Step 3: Cross multiply
    420,077.76x = 579,379.68 × 269,188.80
  4. Step 4: Simplify right side
    420,077.76x = 155,962,520,803.58
  5. Step 5: Solve for x
    x = 155,962,520,803.58/420,077.76
  6. Step 6: Final answer
    x = 371,270.60

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