Finding the Fourth Proportional to 131,874, 181,986.12 and 72,256.72

Step by Step Solution

1. Step 1: Write the proportion equation
   131,874 : 181,986.12 = 72,256.72 : x
2. Step 2: Convert to fraction form
   131,874/181,986.12 = 72,256.72/x
3. Step 3: Cross multiply
   131,874x = 181,986.12 × 72,256.72
4. Step 4: Simplify right side
   131,874x = 13,149,720,116.73
5. Step 5: Solve for x
   x = 13,149,720,116.73/131,874
6. Step 6: Final answer
   x = 99,714.27