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Finding the Fourth Proportional to 407,891.40, 611,837.10 and 266,173.80

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Solution

The fourth proportional to 407,891.40, 611,837.10 and 266,173.80 is: 399,260.70

Step by Step Solution

  1. Step 1: Write the proportion equation
    407,891.40 : 611,837.10 = 266,173.80 : x
  2. Step 2: Convert to fraction form
    407,891.40/611,837.10 = 266,173.80/x
  3. Step 3: Cross multiply
    407,891.40x = 611,837.10 × 266,173.80
  4. Step 4: Simplify right side
    407,891.40x = 162,855,005,887.98
  5. Step 5: Solve for x
    x = 162,855,005,887.98/407,891.40
  6. Step 6: Final answer
    x = 399,260.70

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