Finding the Fourth Proportional to 91,809.10, 137,746.05 and 88,569.10

Step by Step Solution

1. Step 1: Write the proportion equation
   91,809.10 : 137,746.05 = 88,569.10 : x
2. Step 2: Convert to fraction form
   91,809.10/137,746.05 = 88,569.10/x
3. Step 3: Cross multiply
   91,809.10x = 137,746.05 × 88,569.10
4. Step 4: Simplify right side
   91,809.10x = 12,200,043,677.06
5. Step 5: Solve for x
   x = 12,200,043,677.06/91,809.10
6. Step 6: Final answer
   x = 132,884.91