Finding the Fourth Proportional to 91,150.25, 136,528.54 and 88,919.51

Step by Step Solution

1. Step 1: Write the proportion equation
   91,150.25 : 136,528.54 = 88,919.51 : x
2. Step 2: Convert to fraction form
   91,150.25/136,528.54 = 88,919.51/x
3. Step 3: Cross multiply
   91,150.25x = 136,528.54 × 88,919.51
4. Step 4: Simplify right side
   91,150.25x = 12,140,049,750.58
5. Step 5: Solve for x
   x = 12,140,049,750.58/91,150.25
6. Step 6: Final answer
   x = 133,187.24