Finding the Third Proportional to 394,705.50 and 830,671.50

Step by Step Solution

1. Step 1: Write the proportion equation
   394,705.50 : 830,671.50 = 830,671.50 : x
2. Step 2: Convert to fraction form
   394,705.50/830,671.50 = 830,671.50/x
3. Step 3: Cross multiply
   394,705.50x = 830,671.50 × 830,671.50
4. Step 4: Simplify right side
   394,705.50x = 690,015,140,912.25
5. Step 5: Solve for x
   x = 690,015,140,912.25/394,705.50
6. Step 6: Final answer
   x = 1,748,177.16