Finding the Fourth Proportional to 91,590.87, 138,092.63 and 91,022.25

Step by Step Solution

1. Step 1: Write the proportion equation
   91,590.87 : 138,092.63 = 91,022.25 : x
2. Step 2: Convert to fraction form
   91,590.87/138,092.63 = 91,022.25/x
3. Step 3: Cross multiply
   91,590.87x = 138,092.63 × 91,022.25
4. Step 4: Simplify right side
   91,590.87x = 12,569,502,118.57
5. Step 5: Solve for x
   x = 12,569,502,118.57/91,590.87
6. Step 6: Final answer
   x = 137,235.32