Finding the Third Proportional to 721.50 and 1,118.25

Step by Step Solution

1. Step 1: Write the proportion equation
   721.50 : 1,118.25 = 1,118.25 : x
2. Step 2: Convert to fraction form
   721.50/1,118.25 = 1,118.25/x
3. Step 3: Cross multiply
   721.50x = 1,118.25 × 1,118.25
4. Step 4: Simplify right side
   721.50x = 1,250,483.06
5. Step 5: Solve for x
   x = 1,250,483.06/721.50
6. Step 6: Final answer
   x = 1,733.17