Finding the Fourth Proportional to 18,128.72, 25,017.24 and 10,472

Step by Step Solution

1. Step 1: Write the proportion equation
   18,128.72 : 25,017.24 = 10,472 : x
2. Step 2: Convert to fraction form
   18,128.72/25,017.24 = 10,472/x
3. Step 3: Cross multiply
   18,128.72x = 25,017.24 × 10,472
4. Step 4: Simplify right side
   18,128.72x = 261,980,537.28
5. Step 5: Solve for x
   x = 261,980,537.28/18,128.72
6. Step 6: Final answer
   x = 14,451.13