Finding the Third Proportional to 868.88 and 1,891.31

Step by Step Solution

1. Step 1: Write the proportion equation
   868.88 : 1,891.31 = 1,891.31 : x
2. Step 2: Convert to fraction form
   868.88/1,891.31 = 1,891.31/x
3. Step 3: Cross multiply
   868.88x = 1,891.31 × 1,891.31
4. Step 4: Simplify right side
   868.88x = 3,577,062.97
5. Step 5: Solve for x
   x = 3,577,062.97/868.88
6. Step 6: Final answer
   x = 4,116.89