Finding the Third Proportional to 443,539.50 and 678,612

Step by Step Solution

1. Step 1: Write the proportion equation
   443,539.50 : 678,612 = 678,612 : x
2. Step 2: Convert to fraction form
   443,539.50/678,612 = 678,612/x
3. Step 3: Cross multiply
   443,539.50x = 678,612 × 678,612
4. Step 4: Simplify right side
   443,539.50x = 460,514,246,544
5. Step 5: Solve for x
   x = 460,514,246,544/443,539.50
6. Step 6: Final answer
   x = 1,038,271.10