Finding the Third Proportional to 15,520.50 and 21,423.38

Step by Step Solution

1. Step 1: Write the proportion equation
   15,520.50 : 21,423.38 = 21,423.38 : x
2. Step 2: Convert to fraction form
   15,520.50/21,423.38 = 21,423.38/x
3. Step 3: Cross multiply
   15,520.50x = 21,423.38 × 21,423.38
4. Step 4: Simplify right side
   15,520.50x = 458,960,996.39
5. Step 5: Solve for x
   x = 458,960,996.39/15,520.50
6. Step 6: Final answer
   x = 29,571.28