Finding the Third Proportional to 394,978.50 and 864,963

Step by Step Solution

1. Step 1: Write the proportion equation
   394,978.50 : 864,963 = 864,963 : x
2. Step 2: Convert to fraction form
   394,978.50/864,963 = 864,963/x
3. Step 3: Cross multiply
   394,978.50x = 864,963 × 864,963
4. Step 4: Simplify right side
   394,978.50x = 748,160,991,369
5. Step 5: Solve for x
   x = 748,160,991,369/394,978.50
6. Step 6: Final answer
   x = 1,894,181.56