Finding the Third Proportional to 455,457.50 and 680,676

Step by Step Solution

1. Step 1: Write the proportion equation
   455,457.50 : 680,676 = 680,676 : x
2. Step 2: Convert to fraction form
   455,457.50/680,676 = 680,676/x
3. Step 3: Cross multiply
   455,457.50x = 680,676 × 680,676
4. Step 4: Simplify right side
   455,457.50x = 463,319,816,976
5. Step 5: Solve for x
   x = 463,319,816,976/455,457.50
6. Step 6: Final answer
   x = 1,017,262.46