Finding the Fourth Proportional to 25,662.72, 38,406.44 and 21,507.42

Step by Step Solution

1. Step 1: Write the proportion equation
   25,662.72 : 38,406.44 = 21,507.42 : x
2. Step 2: Convert to fraction form
   25,662.72/38,406.44 = 21,507.42/x
3. Step 3: Cross multiply
   25,662.72x = 38,406.44 × 21,507.42
4. Step 4: Simplify right side
   25,662.72x = 826,023,435.78
5. Step 5: Solve for x
   x = 826,023,435.78/25,662.72
6. Step 6: Final answer
   x = 32,187.68