Finding the Third Proportional to 394,410 and 863,452.50

Step by Step Solution

1. Step 1: Write the proportion equation
   394,410 : 863,452.50 = 863,452.50 : x
2. Step 2: Convert to fraction form
   394,410/863,452.50 = 863,452.50/x
3. Step 3: Cross multiply
   394,410x = 863,452.50 × 863,452.50
4. Step 4: Simplify right side
   394,410x = 745,550,219,756.25
5. Step 5: Solve for x
   x = 745,550,219,756.25/394,410
6. Step 6: Final answer
   x = 1,890,292.39