Finding the Fourth Proportional to 131,575.50, 181,578.51 and 71,959.50

Step by Step Solution

1. Step 1: Write the proportion equation
   131,575.50 : 181,578.51 = 71,959.50 : x
2. Step 2: Convert to fraction form
   131,575.50/181,578.51 = 71,959.50/x
3. Step 3: Cross multiply
   131,575.50x = 181,578.51 × 71,959.50
4. Step 4: Simplify right side
   131,575.50x = 13,066,298,790.35
5. Step 5: Solve for x
   x = 13,066,298,790.35/131,575.50
6. Step 6: Final answer
   x = 99,306.47