Finding the Fourth Proportional to 131,568.37, 181,564.34 and 71,139.00

Step by Step Solution

1. Step 1: Write the proportion equation
   131,568.37 : 181,564.34 = 71,139.00 : x
2. Step 2: Convert to fraction form
   131,568.37/181,564.34 = 71,139.00/x
3. Step 3: Cross multiply
   131,568.37x = 181,564.34 × 71,139.00
4. Step 4: Simplify right side
   131,568.37x = 12,916,304,675.44
5. Step 5: Solve for x
   x = 12,916,304,675.44/131,568.37
6. Step 6: Final answer
   x = 98,171.81