Finding the Fourth Proportional to 131,837.49, 181,934.64 and 71,406.72

Step by Step Solution

1. Step 1: Write the proportion equation
   131,837.49 : 181,934.64 = 71,406.72 : x
2. Step 2: Convert to fraction form
   131,837.49/181,934.64 = 71,406.72/x
3. Step 3: Cross multiply
   131,837.49x = 181,934.64 × 71,406.72
4. Step 4: Simplify right side
   131,837.49x = 12,991,355,896.78
5. Step 5: Solve for x
   x = 12,991,355,896.78/131,837.49
6. Step 6: Final answer
   x = 98,540.68