Finding the Fourth Proportional to 91,591.12, 138,093.01 and 91,022.50

Step by Step Solution

1. Step 1: Write the proportion equation
   91,591.12 : 138,093.01 = 91,022.50 : x
2. Step 2: Convert to fraction form
   91,591.12/138,093.01 = 91,022.50/x
3. Step 3: Cross multiply
   91,591.12x = 138,093.01 × 91,022.50
4. Step 4: Simplify right side
   91,591.12x = 12,569,571,002.73
5. Step 5: Solve for x
   x = 12,569,571,002.73/91,591.12
6. Step 6: Final answer
   x = 137,235.69