Finding the Fourth Proportional to 18,492, 25,518.48 and 10,938.72

Step by Step Solution

1. Step 1: Write the proportion equation
   18,492 : 25,518.48 = 10,938.72 : x
2. Step 2: Convert to fraction form
   18,492/25,518.48 = 10,938.72/x
3. Step 3: Cross multiply
   18,492x = 25,518.48 × 10,938.72
4. Step 4: Simplify right side
   18,492x = 279,139,507.55
5. Step 5: Solve for x
   x = 279,139,507.55/18,492
6. Step 6: Final answer
   x = 15,095.15