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Finding the Fourth Proportional to 13,395.58, 20,112.99 and 13,159.36

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Solution

The fourth proportional to 13,395.58, 20,112.99 and 13,159.36 is: 19,758.31

Step by Step Solution

  1. Step 1: Write the proportion equation
    13,395.58 : 20,112.99 = 13,159.36 : x
  2. Step 2: Convert to fraction form
    13,395.58/20,112.99 = 13,159.36/x
  3. Step 3: Cross multiply
    13,395.58x = 20,112.99 × 13,159.36
  4. Step 4: Simplify right side
    13,395.58x = 264,674,076.09
  5. Step 5: Solve for x
    x = 264,674,076.09/13,395.58
  6. Step 6: Final answer
    x = 19,758.31

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