Finding the Fourth Proportional to 91,686.78, 137,509.10 and 25,132.10

Step by Step Solution

1. Step 1: Write the proportion equation
   91,686.78 : 137,509.10 = 25,132.10 : x
2. Step 2: Convert to fraction form
   91,686.78/137,509.10 = 25,132.10/x
3. Step 3: Cross multiply
   91,686.78x = 137,509.10 × 25,132.10
4. Step 4: Simplify right side
   91,686.78x = 3,455,891,638.90
5. Step 5: Solve for x
   x = 3,455,891,638.90/91,686.78
6. Step 6: Final answer
   x = 37,692.37