Finding the Third Proportional to 354,630 and 769,543.50

Step by Step Solution

1. Step 1: Write the proportion equation
   354,630 : 769,543.50 = 769,543.50 : x
2. Step 2: Convert to fraction form
   354,630/769,543.50 = 769,543.50/x
3. Step 3: Cross multiply
   354,630x = 769,543.50 × 769,543.50
4. Step 4: Simplify right side
   354,630x = 592,197,198,392.25
5. Step 5: Solve for x
   x = 592,197,198,392.25/354,630
6. Step 6: Final answer
   x = 1,669,901.58