Finding the Fourth Proportional to 22,472.07, 31,012.45 and 12,915.04

Step by Step Solution

1. Step 1: Write the proportion equation
   22,472.07 : 31,012.45 = 12,915.04 : x
2. Step 2: Convert to fraction form
   22,472.07/31,012.45 = 12,915.04/x
3. Step 3: Cross multiply
   22,472.07x = 31,012.45 × 12,915.04
4. Step 4: Simplify right side
   22,472.07x = 400,526,922.43
5. Step 5: Solve for x
   x = 400,526,922.43/22,472.07
6. Step 6: Final answer
   x = 17,823.32