Finding the Fourth Proportional to 18,458.42, 25,470.05 and 10,499.76

Step by Step Solution

1. Step 1: Write the proportion equation
   18,458.42 : 25,470.05 = 10,499.76 : x
2. Step 2: Convert to fraction form
   18,458.42/25,470.05 = 10,499.76/x
3. Step 3: Cross multiply
   18,458.42x = 25,470.05 × 10,499.76
4. Step 4: Simplify right side
   18,458.42x = 267,429,359.69
5. Step 5: Solve for x
   x = 267,429,359.69/18,458.42
6. Step 6: Final answer
   x = 14,488.21