Finding the Third Proportional to 643,704 and 945,850

Step by Step Solution

1. Step 1: Write the proportion equation
   643,704 : 945,850 = 945,850 : x
2. Step 2: Convert to fraction form
   643,704/945,850 = 945,850/x
3. Step 3: Cross multiply
   643,704x = 945,850 × 945,850
4. Step 4: Simplify right side
   643,704x = 894,632,222,500
5. Step 5: Solve for x
   x = 894,632,222,500/643,704
6. Step 6: Final answer
   x = 1,389,819.27