Finding the Fourth Proportional to 81,062.72, 121,612.80 and 25,658.72

Step by Step Solution

1. Step 1: Write the proportion equation
   81,062.72 : 121,612.80 = 25,658.72 : x
2. Step 2: Convert to fraction form
   81,062.72/121,612.80 = 25,658.72/x
3. Step 3: Cross multiply
   81,062.72x = 121,612.80 × 25,658.72
4. Step 4: Simplify right side
   81,062.72x = 3,120,428,783.62
5. Step 5: Solve for x
   x = 3,120,428,783.62/81,062.72
6. Step 6: Final answer
   x = 38,494.01