Finding the Fourth Proportional to 25,499.82, 38,272.21 and 13,663.29

Step by Step Solution

1. Step 1: Write the proportion equation
   25,499.82 : 38,272.21 = 13,663.29 : x
2. Step 2: Convert to fraction form
   25,499.82/38,272.21 = 13,663.29/x
3. Step 3: Cross multiply
   25,499.82x = 38,272.21 × 13,663.29
4. Step 4: Simplify right side
   25,499.82x = 522,924,270.01
5. Step 5: Solve for x
   x = 522,924,270.01/25,499.82
6. Step 6: Final answer
   x = 20,506.98