Finding the Fourth Proportional to 91,693.62, 137,539.89 and 25,128.63

Step by Step Solution

1. Step 1: Write the proportion equation
   91,693.62 : 137,539.89 = 25,128.63 : x
2. Step 2: Convert to fraction form
   91,693.62/137,539.89 = 25,128.63/x
3. Step 3: Cross multiply
   91,693.62x = 137,539.89 × 25,128.63
4. Step 4: Simplify right side
   91,693.62x = 3,456,189,006.05
5. Step 5: Solve for x
   x = 3,456,189,006.05/91,693.62
6. Step 6: Final answer
   x = 37,692.80