Finding the Third Proportional to 15,124.50 and 21,255.75

Step by Step Solution

1. Step 1: Write the proportion equation
   15,124.50 : 21,255.75 = 21,255.75 : x
2. Step 2: Convert to fraction form
   15,124.50/21,255.75 = 21,255.75/x
3. Step 3: Cross multiply
   15,124.50x = 21,255.75 × 21,255.75
4. Step 4: Simplify right side
   15,124.50x = 451,806,908.06
5. Step 5: Solve for x
   x = 451,806,908.06/15,124.50
6. Step 6: Final answer
   x = 29,872.52