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Finding the Fourth Proportional to 117,590.80, 176,386.20 and 78,019.60

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Solution

The fourth proportional to 117,590.80, 176,386.20 and 78,019.60 is: 117,029.40

Step by Step Solution

  1. Step 1: Write the proportion equation
    117,590.80 : 176,386.20 = 78,019.60 : x
  2. Step 2: Convert to fraction form
    117,590.80/176,386.20 = 78,019.60/x
  3. Step 3: Cross multiply
    117,590.80x = 176,386.20 × 78,019.60
  4. Step 4: Simplify right side
    117,590.80x = 13,761,580,769.52
  5. Step 5: Solve for x
    x = 13,761,580,769.52/117,590.80
  6. Step 6: Final answer
    x = 117,029.40

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