Finding the Third Proportional to 455,460 and 680,680.50

Step by Step Solution

1. Step 1: Write the proportion equation
   455,460 : 680,680.50 = 680,680.50 : x
2. Step 2: Convert to fraction form
   455,460/680,680.50 = 680,680.50/x
3. Step 3: Cross multiply
   455,460x = 680,680.50 × 680,680.50
4. Step 4: Simplify right side
   455,460x = 463,325,943,080.25
5. Step 5: Solve for x
   x = 463,325,943,080.25/455,460
6. Step 6: Final answer
   x = 1,017,270.33