Finding the Fourth Proportional to 23,129.10, 31,918.32 and 12,518.82

Step by Step Solution

1. Step 1: Write the proportion equation
   23,129.10 : 31,918.32 = 12,518.82 : x
2. Step 2: Convert to fraction form
   23,129.10/31,918.32 = 12,518.82/x
3. Step 3: Cross multiply
   23,129.10x = 31,918.32 × 12,518.82
4. Step 4: Simplify right side
   23,129.10x = 399,579,702.78
5. Step 5: Solve for x
   x = 399,579,702.78/23,129.10
6. Step 6: Final answer
   x = 17,276.06