Finding the Third Proportional to 394,081.50 and 611,454

Step by Step Solution

1. Step 1: Write the proportion equation
   394,081.50 : 611,454 = 611,454 : x
2. Step 2: Convert to fraction form
   394,081.50/611,454 = 611,454/x
3. Step 3: Cross multiply
   394,081.50x = 611,454 × 611,454
4. Step 4: Simplify right side
   394,081.50x = 373,875,994,116
5. Step 5: Solve for x
   x = 373,875,994,116/394,081.50
6. Step 6: Final answer
   x = 948,727.60