Finding the Fourth Proportional to 12,143.10, 17,034.90 and 12,143.10

Step by Step Solution

1. Step 1: Write the proportion equation
   12,143.10 : 17,034.90 = 12,143.10 : x
2. Step 2: Convert to fraction form
   12,143.10/17,034.90 = 12,143.10/x
3. Step 3: Cross multiply
   12,143.10x = 17,034.90 × 12,143.10
4. Step 4: Simplify right side
   12,143.10x = 206,856,494.19
5. Step 5: Solve for x
   x = 206,856,494.19/12,143.10
6. Step 6: Final answer
   x = 17,034.90