Finding the Fourth Proportional to 91,808.10, 137,906.55 and 88,503.30

Step by Step Solution

1. Step 1: Write the proportion equation
   91,808.10 : 137,906.55 = 88,503.30 : x
2. Step 2: Convert to fraction form
   91,808.10/137,906.55 = 88,503.30/x
3. Step 3: Cross multiply
   91,808.10x = 137,906.55 × 88,503.30
4. Step 4: Simplify right side
   91,808.10x = 12,205,184,766.62
5. Step 5: Solve for x
   x = 12,205,184,766.62/91,808.10
6. Step 6: Final answer
   x = 132,942.35