Finding the Third Proportional to 394,645.50 and 838,485

Step by Step Solution

1. Step 1: Write the proportion equation
   394,645.50 : 838,485 = 838,485 : x
2. Step 2: Convert to fraction form
   394,645.50/838,485 = 838,485/x
3. Step 3: Cross multiply
   394,645.50x = 838,485 × 838,485
4. Step 4: Simplify right side
   394,645.50x = 703,057,095,225
5. Step 5: Solve for x
   x = 703,057,095,225/394,645.50
6. Step 6: Final answer
   x = 1,781,490.21