Finding the Fourth Proportional to 22,564.80, 31,139.05 and 12,493.02

Step by Step Solution

1. Step 1: Write the proportion equation
   22,564.80 : 31,139.05 = 12,493.02 : x
2. Step 2: Convert to fraction form
   22,564.80/31,139.05 = 12,493.02/x
3. Step 3: Cross multiply
   22,564.80x = 31,139.05 × 12,493.02
4. Step 4: Simplify right side
   22,564.80x = 389,020,774.43
5. Step 5: Solve for x
   x = 389,020,774.43/22,564.80
6. Step 6: Final answer
   x = 17,240.16