Finding the Third Proportional to 12,820.50 and 17,115.75

Step by Step Solution

1. Step 1: Write the proportion equation
   12,820.50 : 17,115.75 = 17,115.75 : x
2. Step 2: Convert to fraction form
   12,820.50/17,115.75 = 17,115.75/x
3. Step 3: Cross multiply
   12,820.50x = 17,115.75 × 17,115.75
4. Step 4: Simplify right side
   12,820.50x = 292,948,898.06
5. Step 5: Solve for x
   x = 292,948,898.06/12,820.50
6. Step 6: Final answer
   x = 22,850.04