Finding the Third Proportional to 8,217.84 and 12,200.06

Step by Step Solution

1. Step 1: Write the proportion equation
   8,217.84 : 12,200.06 = 12,200.06 : x
2. Step 2: Convert to fraction form
   8,217.84/12,200.06 = 12,200.06/x
3. Step 3: Cross multiply
   8,217.84x = 12,200.06 × 12,200.06
4. Step 4: Simplify right side
   8,217.84x = 148,841,525.00
5. Step 5: Solve for x
   x = 148,841,525.00/8,217.84
6. Step 6: Final answer
   x = 18,111.99