Finding the Fourth Proportional to 22,563.30, 31,136.98 and 12,491.52

Step by Step Solution

1. Step 1: Write the proportion equation
   22,563.30 : 31,136.98 = 12,491.52 : x
2. Step 2: Convert to fraction form
   22,563.30/31,136.98 = 12,491.52/x
3. Step 3: Cross multiply
   22,563.30x = 31,136.98 × 12,491.52
4. Step 4: Simplify right side
   22,563.30x = 388,948,145.95
5. Step 5: Solve for x
   x = 388,948,145.95/22,563.30
6. Step 6: Final answer
   x = 17,238.09