Finding the Fourth Proportional to 22,557.33, 31,128.13 and 12,485.17

Step by Step Solution

1. Step 1: Write the proportion equation
   22,557.33 : 31,128.13 = 12,485.17 : x
2. Step 2: Convert to fraction form
   22,557.33/31,128.13 = 12,485.17/x
3. Step 3: Cross multiply
   22,557.33x = 31,128.13 × 12,485.17
4. Step 4: Simplify right side
   22,557.33x = 388,639,776.77
5. Step 5: Solve for x
   x = 388,639,776.77/22,557.33
6. Step 6: Final answer
   x = 17,228.98