Finding the Third Proportional to 393,975 and 863,149.50

Step by Step Solution

1. Step 1: Write the proportion equation
   393,975 : 863,149.50 = 863,149.50 : x
2. Step 2: Convert to fraction form
   393,975/863,149.50 = 863,149.50/x
3. Step 3: Cross multiply
   393,975x = 863,149.50 × 863,149.50
4. Step 4: Simplify right side
   393,975x = 745,027,059,350.25
5. Step 5: Solve for x
   x = 745,027,059,350.25/393,975
6. Step 6: Final answer
   x = 1,891,051.61