Finding the Third Proportional to 15,121.69 and 20,024.72

Step by Step Solution

1. Step 1: Write the proportion equation
   15,121.69 : 20,024.72 = 20,024.72 : x
2. Step 2: Convert to fraction form
   15,121.69/20,024.72 = 20,024.72/x
3. Step 3: Cross multiply
   15,121.69x = 20,024.72 × 20,024.72
4. Step 4: Simplify right side
   15,121.69x = 400,989,361.02
5. Step 5: Solve for x
   x = 400,989,361.02/15,121.69
6. Step 6: Final answer
   x = 26,517.50