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Finding the Fourth Proportional to 407,805.40, 611,708.10 and 266,087.80

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Solution

The fourth proportional to 407,805.40, 611,708.10 and 266,087.80 is: 399,131.70

Step by Step Solution

  1. Step 1: Write the proportion equation
    407,805.40 : 611,708.10 = 266,087.80 : x
  2. Step 2: Convert to fraction form
    407,805.40/611,708.10 = 266,087.80/x
  3. Step 3: Cross multiply
    407,805.40x = 611,708.10 × 266,087.80
  4. Step 4: Simplify right side
    407,805.40x = 162,768,062,571.18
  5. Step 5: Solve for x
    x = 162,768,062,571.18/407,805.40
  6. Step 6: Final answer
    x = 399,131.70

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