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Finding the Fourth Proportional to 11,992.70, 17,978.15 and 4,197.26

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Solution

The fourth proportional to 11,992.70, 17,978.15 and 4,197.26 is: 6,292.07

Step by Step Solution

  1. Step 1: Write the proportion equation
    11,992.70 : 17,978.15 = 4,197.26 : x
  2. Step 2: Convert to fraction form
    11,992.70/17,978.15 = 4,197.26/x
  3. Step 3: Cross multiply
    11,992.70x = 17,978.15 × 4,197.26
  4. Step 4: Simplify right side
    11,992.70x = 75,458,890.47
  5. Step 5: Solve for x
    x = 75,458,890.47/11,992.70
  6. Step 6: Final answer
    x = 6,292.07

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