Finding the Third Proportional to 15,223.50 and 21,381.75

Step by Step Solution

1. Step 1: Write the proportion equation
   15,223.50 : 21,381.75 = 21,381.75 : x
2. Step 2: Convert to fraction form
   15,223.50/21,381.75 = 21,381.75/x
3. Step 3: Cross multiply
   15,223.50x = 21,381.75 × 21,381.75
4. Step 4: Simplify right side
   15,223.50x = 457,179,233.06
5. Step 5: Solve for x
   x = 457,179,233.06/15,223.50
6. Step 6: Final answer
   x = 30,031.15