Finding the Third Proportional to 868.85 and 1,851.61

Step by Step Solution

1. Step 1: Write the proportion equation
   868.85 : 1,851.61 = 1,851.61 : x
2. Step 2: Convert to fraction form
   868.85/1,851.61 = 1,851.61/x
3. Step 3: Cross multiply
   868.85x = 1,851.61 × 1,851.61
4. Step 4: Simplify right side
   868.85x = 3,428,457.28
5. Step 5: Solve for x
   x = 3,428,457.28/868.85
6. Step 6: Final answer
   x = 3,945.96