Finding the Fourth Proportional to 22,452.96, 31,012.56 and 15,402.72

Step by Step Solution

1. Step 1: Write the proportion equation
   22,452.96 : 31,012.56 = 15,402.72 : x
2. Step 2: Convert to fraction form
   22,452.96/31,012.56 = 15,402.72/x
3. Step 3: Cross multiply
   22,452.96x = 31,012.56 × 15,402.72
4. Step 4: Simplify right side
   22,452.96x = 477,677,778.16
5. Step 5: Solve for x
   x = 477,677,778.16/22,452.96
6. Step 6: Final answer
   x = 21,274.60