Finding the Fourth Proportional to 12,332.10, 18,476.55 and 10,128.90

Step by Step Solution

1. Step 1: Write the proportion equation
   12,332.10 : 18,476.55 = 10,128.90 : x
2. Step 2: Convert to fraction form
   12,332.10/18,476.55 = 10,128.90/x
3. Step 3: Cross multiply
   12,332.10x = 18,476.55 × 10,128.90
4. Step 4: Simplify right side
   12,332.10x = 187,147,127.30
5. Step 5: Solve for x
   x = 187,147,127.30/12,332.10
6. Step 6: Final answer
   x = 15,175.61