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Finding the Fourth Proportional to 1,112.48, 1,667.44 and 1,057.44

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Solution

The fourth proportional to 1,112.48, 1,667.44 and 1,057.44 is: 1,584.94

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,112.48 : 1,667.44 = 1,057.44 : x
  2. Step 2: Convert to fraction form
    1,112.48/1,667.44 = 1,057.44/x
  3. Step 3: Cross multiply
    1,112.48x = 1,667.44 × 1,057.44
  4. Step 4: Simplify right side
    1,112.48x = 1,763,217.75
  5. Step 5: Solve for x
    x = 1,763,217.75/1,112.48
  6. Step 6: Final answer
    x = 1,584.94

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