Finding the Third Proportional to 394,164 and 864,628.50

Step by Step Solution

1. Step 1: Write the proportion equation
   394,164 : 864,628.50 = 864,628.50 : x
2. Step 2: Convert to fraction form
   394,164/864,628.50 = 864,628.50/x
3. Step 3: Cross multiply
   394,164x = 864,628.50 × 864,628.50
4. Step 4: Simplify right side
   394,164x = 747,582,443,012.25
5. Step 5: Solve for x
   x = 747,582,443,012.25/394,164
6. Step 6: Final answer
   x = 1,896,627.91