Finding the Fourth Proportional to 18,456.35, 25,470.32 and 10,499.31

Step by Step Solution

1. Step 1: Write the proportion equation
   18,456.35 : 25,470.32 = 10,499.31 : x
2. Step 2: Convert to fraction form
   18,456.35/25,470.32 = 10,499.31/x
3. Step 3: Cross multiply
   18,456.35x = 25,470.32 × 10,499.31
4. Step 4: Simplify right side
   18,456.35x = 267,420,732.98
5. Step 5: Solve for x
   x = 267,420,732.98/18,456.35
6. Step 6: Final answer
   x = 14,489.37