Finding the Fourth Proportional to 18,456.15, 25,471.53 and 10,499.91

Step by Step Solution

1. Step 1: Write the proportion equation
   18,456.15 : 25,471.53 = 10,499.91 : x
2. Step 2: Convert to fraction form
   18,456.15/25,471.53 = 10,499.91/x
3. Step 3: Cross multiply
   18,456.15x = 25,471.53 × 10,499.91
4. Step 4: Simplify right side
   18,456.15x = 267,448,772.56
5. Step 5: Solve for x
   x = 267,448,772.56/18,456.15
6. Step 6: Final answer
   x = 14,491.04