Finding the Fourth Proportional to 22,563, 31,137.18 and 12,491.60

Step by Step Solution

1. Step 1: Write the proportion equation
   22,563 : 31,137.18 = 12,491.60 : x
2. Step 2: Convert to fraction form
   22,563/31,137.18 = 12,491.60/x
3. Step 3: Cross multiply
   22,563x = 31,137.18 × 12,491.60
4. Step 4: Simplify right side
   22,563x = 388,953,197.69
5. Step 5: Solve for x
   x = 388,953,197.69/22,563
6. Step 6: Final answer
   x = 17,238.54