Finding the Third Proportional to 485,401.50 and 759,789

Step by Step Solution

1. Step 1: Write the proportion equation
   485,401.50 : 759,789 = 759,789 : x
2. Step 2: Convert to fraction form
   485,401.50/759,789 = 759,789/x
3. Step 3: Cross multiply
   485,401.50x = 759,789 × 759,789
4. Step 4: Simplify right side
   485,401.50x = 577,279,324,521
5. Step 5: Solve for x
   x = 577,279,324,521/485,401.50
6. Step 6: Final answer
   x = 1,189,282.12