Finding the Fourth Proportional to 22,764.96, 31,404.49 and 15,213.15

Step by Step Solution

1. Step 1: Write the proportion equation
   22,764.96 : 31,404.49 = 15,213.15 : x
2. Step 2: Convert to fraction form
   22,764.96/31,404.49 = 15,213.15/x
3. Step 3: Cross multiply
   22,764.96x = 31,404.49 × 15,213.15
4. Step 4: Simplify right side
   22,764.96x = 477,761,217.04
5. Step 5: Solve for x
   x = 477,761,217.04/22,764.96
6. Step 6: Final answer
   x = 20,986.69