Finding the Fourth Proportional to 22,588.87, 31,172.27 and 12,517.28

Step by Step Solution

1. Step 1: Write the proportion equation
   22,588.87 : 31,172.27 = 12,517.28 : x
2. Step 2: Convert to fraction form
   22,588.87/31,172.27 = 12,517.28/x
3. Step 3: Cross multiply
   22,588.87x = 31,172.27 × 12,517.28
4. Step 4: Simplify right side
   22,588.87x = 390,192,031.83
5. Step 5: Solve for x
   x = 390,192,031.83/22,588.87
6. Step 6: Final answer
   x = 17,273.64