Finding the Fourth Proportional to 23,128.63, 31,915.68 and 13,059.52

Step by Step Solution

1. Step 1: Write the proportion equation
   23,128.63 : 31,915.68 = 13,059.52 : x
2. Step 2: Convert to fraction form
   23,128.63/31,915.68 = 13,059.52/x
3. Step 3: Cross multiply
   23,128.63x = 31,915.68 × 13,059.52
4. Step 4: Simplify right side
   23,128.63x = 416,803,461.27
5. Step 5: Solve for x
   x = 416,803,461.27/23,128.63
6. Step 6: Final answer
   x = 18,021.10