Finding the Fourth Proportional to 25,662.42, 38,422.62 and 13,155.48

Step by Step Solution

1. Step 1: Write the proportion equation
   25,662.42 : 38,422.62 = 13,155.48 : x
2. Step 2: Convert to fraction form
   25,662.42/38,422.62 = 13,155.48/x
3. Step 3: Cross multiply
   25,662.42x = 38,422.62 × 13,155.48
4. Step 4: Simplify right side
   25,662.42x = 505,468,008.96
5. Step 5: Solve for x
   x = 505,468,008.96/25,662.42
6. Step 6: Final answer
   x = 19,696.82