Finding the Third Proportional to 718.82 and 1,089.02

Step by Step Solution

1. Step 1: Write the proportion equation
   718.82 : 1,089.02 = 1,089.02 : x
2. Step 2: Convert to fraction form
   718.82/1,089.02 = 1,089.02/x
3. Step 3: Cross multiply
   718.82x = 1,089.02 × 1,089.02
4. Step 4: Simplify right side
   718.82x = 1,185,959.29
5. Step 5: Solve for x
   x = 1,185,959.29/718.82
6. Step 6: Final answer
   x = 1,649.86