Finding the Third Proportional to 3,117 and 7,216.50

Step by Step Solution

1. Step 1: Write the proportion equation
   3,117 : 7,216.50 = 7,216.50 : x
2. Step 2: Convert to fraction form
   3,117/7,216.50 = 7,216.50/x
3. Step 3: Cross multiply
   3,117x = 7,216.50 × 7,216.50
4. Step 4: Simplify right side
   3,117x = 52,077,872.25
5. Step 5: Solve for x
   x = 52,077,872.25/3,117
6. Step 6: Final answer
   x = 16,707.69