Finding the Third Proportional to 8,517 and 13,612.50

Step by Step Solution

1. Step 1: Write the proportion equation
   8,517 : 13,612.50 = 13,612.50 : x
2. Step 2: Convert to fraction form
   8,517/13,612.50 = 13,612.50/x
3. Step 3: Cross multiply
   8,517x = 13,612.50 × 13,612.50
4. Step 4: Simplify right side
   8,517x = 185,300,156.25
5. Step 5: Solve for x
   x = 185,300,156.25/8,517
6. Step 6: Final answer
   x = 21,756.51