Finding the Fourth Proportional to 25,663.72, 38,407.94 and 21,508.42

Step by Step Solution

1. Step 1: Write the proportion equation
   25,663.72 : 38,407.94 = 21,508.42 : x
2. Step 2: Convert to fraction form
   25,663.72/38,407.94 = 21,508.42/x
3. Step 3: Cross multiply
   25,663.72x = 38,407.94 × 21,508.42
4. Step 4: Simplify right side
   25,663.72x = 826,094,104.85
5. Step 5: Solve for x
   x = 826,094,104.85/25,663.72
6. Step 6: Final answer
   x = 32,189.18