Finding the Third Proportional to 721.50 and 1,498.13

Step by Step Solution

1. Step 1: Write the proportion equation
   721.50 : 1,498.13 = 1,498.13 : x
2. Step 2: Convert to fraction form
   721.50/1,498.13 = 1,498.13/x
3. Step 3: Cross multiply
   721.50x = 1,498.13 × 1,498.13
4. Step 4: Simplify right side
   721.50x = 2,244,378.52
5. Step 5: Solve for x
   x = 2,244,378.52/721.50
6. Step 6: Final answer
   x = 3,110.71