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Finding the Fourth Proportional to 352,721.55, 528,929.24 and 128,007.30

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Solution

The fourth proportional to 352,721.55, 528,929.24 and 128,007.30 is: 191,955.39

Step by Step Solution

  1. Step 1: Write the proportion equation
    352,721.55 : 528,929.24 = 128,007.30 : x
  2. Step 2: Convert to fraction form
    352,721.55/528,929.24 = 128,007.30/x
  3. Step 3: Cross multiply
    352,721.55x = 528,929.24 × 128,007.30
  4. Step 4: Simplify right side
    352,721.55x = 67,706,803,263.42
  5. Step 5: Solve for x
    x = 67,706,803,263.42/352,721.55
  6. Step 6: Final answer
    x = 191,955.39

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