Finding the Fourth Proportional to 131,920, 182,049.60 and 72,302.72

Step by Step Solution

1. Step 1: Write the proportion equation
   131,920 : 182,049.60 = 72,302.72 : x
2. Step 2: Convert to fraction form
   131,920/182,049.60 = 72,302.72/x
3. Step 3: Cross multiply
   131,920x = 182,049.60 × 72,302.72
4. Step 4: Simplify right side
   131,920x = 13,162,681,254.91
5. Step 5: Solve for x
   x = 13,162,681,254.91/131,920
6. Step 6: Final answer
   x = 99,777.75