Finding the Fourth Proportional to 18,456.32, 25,469.78 and 10,499.10

Step by Step Solution

1. Step 1: Write the proportion equation
   18,456.32 : 25,469.78 = 10,499.10 : x
2. Step 2: Convert to fraction form
   18,456.32/25,469.78 = 10,499.10/x
3. Step 3: Cross multiply
   18,456.32x = 25,469.78 × 10,499.10
4. Step 4: Simplify right side
   18,456.32x = 267,409,767.20
5. Step 5: Solve for x
   x = 267,409,767.20/18,456.32
6. Step 6: Final answer
   x = 14,488.79