Finding the Third Proportional to 700.88 and 1,087.31

Step by Step Solution

1. Step 1: Write the proportion equation
   700.88 : 1,087.31 = 1,087.31 : x
2. Step 2: Convert to fraction form
   700.88/1,087.31 = 1,087.31/x
3. Step 3: Cross multiply
   700.88x = 1,087.31 × 1,087.31
4. Step 4: Simplify right side
   700.88x = 1,182,248.47
5. Step 5: Solve for x
   x = 1,182,248.47/700.88
6. Step 6: Final answer
   x = 1,686.82