Finding the Fourth Proportional to 18,456, 25,468.56 and 10,499.28

Step by Step Solution

1. Step 1: Write the proportion equation
   18,456 : 25,468.56 = 10,499.28 : x
2. Step 2: Convert to fraction form
   18,456/25,468.56 = 10,499.28/x
3. Step 3: Cross multiply
   18,456x = 25,468.56 × 10,499.28
4. Step 4: Simplify right side
   18,456x = 267,401,542.64
5. Step 5: Solve for x
   x = 267,401,542.64/18,456
6. Step 6: Final answer
   x = 14,488.60