Finding the Third Proportional to 394,692 and 864,499.50

Step by Step Solution

1. Step 1: Write the proportion equation
   394,692 : 864,499.50 = 864,499.50 : x
2. Step 2: Convert to fraction form
   394,692/864,499.50 = 864,499.50/x
3. Step 3: Cross multiply
   394,692x = 864,499.50 × 864,499.50
4. Step 4: Simplify right side
   394,692x = 747,359,385,500.25
5. Step 5: Solve for x
   x = 747,359,385,500.25/394,692
6. Step 6: Final answer
   x = 1,893,525.55