Finding the Fourth Proportional to 105,647.48, 158,470.02 and 25,685.90

Step by Step Solution

1. Step 1: Write the proportion equation
   105,647.48 : 158,470.02 = 25,685.90 : x
2. Step 2: Convert to fraction form
   105,647.48/158,470.02 = 25,685.90/x
3. Step 3: Cross multiply
   105,647.48x = 158,470.02 × 25,685.90
4. Step 4: Simplify right side
   105,647.48x = 4,070,445,086.72
5. Step 5: Solve for x
   x = 4,070,445,086.72/105,647.48
6. Step 6: Final answer
   x = 38,528.56