Finding the Fourth Proportional to 91,492.61, 136,340.96 and 88,482.78

Step by Step Solution

1. Step 1: Write the proportion equation
   91,492.61 : 136,340.96 = 88,482.78 : x
2. Step 2: Convert to fraction form
   91,492.61/136,340.96 = 88,482.78/x
3. Step 3: Cross multiply
   91,492.61x = 136,340.96 × 88,482.78
4. Step 4: Simplify right side
   91,492.61x = 12,063,826,726.25
5. Step 5: Solve for x
   x = 12,063,826,726.25/91,492.61
6. Step 6: Final answer
   x = 131,855.76