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Finding the Fourth Proportional to 458,202.80, 687,304.20 and 399,153.80

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Solution

The fourth proportional to 458,202.80, 687,304.20 and 399,153.80 is: 598,730.70

Step by Step Solution

  1. Step 1: Write the proportion equation
    458,202.80 : 687,304.20 = 399,153.80 : x
  2. Step 2: Convert to fraction form
    458,202.80/687,304.20 = 399,153.80/x
  3. Step 3: Cross multiply
    458,202.80x = 687,304.20 × 399,153.80
  4. Step 4: Simplify right side
    458,202.80x = 274,340,083,185.96
  5. Step 5: Solve for x
    x = 274,340,083,185.96/458,202.80
  6. Step 6: Final answer
    x = 598,730.70

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