Finding the Third Proportional to 394,171.50 and 864,646

Step by Step Solution

1. Step 1: Write the proportion equation
   394,171.50 : 864,646 = 864,646 : x
2. Step 2: Convert to fraction form
   394,171.50/864,646 = 864,646/x
3. Step 3: Cross multiply
   394,171.50x = 864,646 × 864,646
4. Step 4: Simplify right side
   394,171.50x = 747,612,705,316
5. Step 5: Solve for x
   x = 747,612,705,316/394,171.50
6. Step 6: Final answer
   x = 1,896,668.60