Finding the Fourth Proportional to 18,445.54, 25,457 and 10,488.96

Step by Step Solution

1. Step 1: Write the proportion equation
   18,445.54 : 25,457 = 10,488.96 : x
2. Step 2: Convert to fraction form
   18,445.54/25,457 = 10,488.96/x
3. Step 3: Cross multiply
   18,445.54x = 25,457 × 10,488.96
4. Step 4: Simplify right side
   18,445.54x = 267,017,454.72
5. Step 5: Solve for x
   x = 267,017,454.72/18,445.54
6. Step 6: Final answer
   x = 14,475.99