Finding the Fourth Proportional to 23,127.30, 31,915.64 and 12,516.91

Step by Step Solution

1. Step 1: Write the proportion equation
   23,127.30 : 31,915.64 = 12,516.91 : x
2. Step 2: Convert to fraction form
   23,127.30/31,915.64 = 12,516.91/x
3. Step 3: Cross multiply
   23,127.30x = 31,915.64 × 12,516.91
4. Step 4: Simplify right side
   23,127.30x = 399,485,144.98
5. Step 5: Solve for x
   x = 399,485,144.98/23,127.30
6. Step 6: Final answer
   x = 17,273.32