Finding the Third Proportional to 660.42 and 1,109.16

Step by Step Solution

1. Step 1: Write the proportion equation
   660.42 : 1,109.16 = 1,109.16 : x
2. Step 2: Convert to fraction form
   660.42/1,109.16 = 1,109.16/x
3. Step 3: Cross multiply
   660.42x = 1,109.16 × 1,109.16
4. Step 4: Simplify right side
   660.42x = 1,230,240.58
5. Step 5: Solve for x
   x = 1,230,240.58/660.42
6. Step 6: Final answer
   x = 1,862.82