Finding the Third Proportional to 435,344.50 and 672,718.50

Step by Step Solution

1. Step 1: Write the proportion equation
   435,344.50 : 672,718.50 = 672,718.50 : x
2. Step 2: Convert to fraction form
   435,344.50/672,718.50 = 672,718.50/x
3. Step 3: Cross multiply
   435,344.50x = 672,718.50 × 672,718.50
4. Step 4: Simplify right side
   435,344.50x = 452,550,180,242.25
5. Step 5: Solve for x
   x = 452,550,180,242.25/435,344.50
6. Step 6: Final answer
   x = 1,039,521.99