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Finding the Fourth Proportional to 458,219.60, 687,329.40 and 121,259.60

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Solution

The fourth proportional to 458,219.60, 687,329.40 and 121,259.60 is: 181,889.40

Step by Step Solution

  1. Step 1: Write the proportion equation
    458,219.60 : 687,329.40 = 121,259.60 : x
  2. Step 2: Convert to fraction form
    458,219.60/687,329.40 = 121,259.60/x
  3. Step 3: Cross multiply
    458,219.60x = 687,329.40 × 121,259.60
  4. Step 4: Simplify right side
    458,219.60x = 83,345,288,112.24
  5. Step 5: Solve for x
    x = 83,345,288,112.24/458,219.60
  6. Step 6: Final answer
    x = 181,889.40

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