Finding the Fourth Proportional to 91,156.89, 136,538.46 and 88,926.15

Step by Step Solution

1. Step 1: Write the proportion equation
   91,156.89 : 136,538.46 = 88,926.15 : x
2. Step 2: Convert to fraction form
   91,156.89/136,538.46 = 88,926.15/x
3. Step 3: Cross multiply
   91,156.89x = 136,538.46 × 88,926.15
4. Step 4: Simplify right side
   91,156.89x = 12,141,839,574.73
5. Step 5: Solve for x
   x = 12,141,839,574.73/91,156.89
6. Step 6: Final answer
   x = 133,197.17