Finding the Third Proportional to 718.25 and 1,111.25

Step by Step Solution

1. Step 1: Write the proportion equation
   718.25 : 1,111.25 = 1,111.25 : x
2. Step 2: Convert to fraction form
   718.25/1,111.25 = 1,111.25/x
3. Step 3: Cross multiply
   718.25x = 1,111.25 × 1,111.25
4. Step 4: Simplify right side
   718.25x = 1,234,876.56
5. Step 5: Solve for x
   x = 1,234,876.56/718.25
6. Step 6: Final answer
   x = 1,719.29