Finding the Third Proportional to 718.88 and 1,085.06

Step by Step Solution

1. Step 1: Write the proportion equation
   718.88 : 1,085.06 = 1,085.06 : x
2. Step 2: Convert to fraction form
   718.88/1,085.06 = 1,085.06/x
3. Step 3: Cross multiply
   718.88x = 1,085.06 × 1,085.06
4. Step 4: Simplify right side
   718.88x = 1,177,360.63
5. Step 5: Solve for x
   x = 1,177,360.63/718.88
6. Step 6: Final answer
   x = 1,637.78