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Finding the Fourth Proportional to 660,039.20, 989,864.40 and 260,547.20

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Solution

The fourth proportional to 660,039.20, 989,864.40 and 260,547.20 is: 390,744.06

Step by Step Solution

  1. Step 1: Write the proportion equation
    660,039.20 : 989,864.40 = 260,547.20 : x
  2. Step 2: Convert to fraction form
    660,039.20/989,864.40 = 260,547.20/x
  3. Step 3: Cross multiply
    660,039.20x = 989,864.40 × 260,547.20
  4. Step 4: Simplify right side
    660,039.20x = 257,906,397,799.68
  5. Step 5: Solve for x
    x = 257,906,397,799.68/660,039.20
  6. Step 6: Final answer
    x = 390,744.06

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