Finding the Third Proportional to 680,400 and 1,491,696

Step by Step Solution

1. Step 1: Write the proportion equation
   680,400 : 1,491,696 = 1,491,696 : x
2. Step 2: Convert to fraction form
   680,400/1,491,696 = 1,491,696/x
3. Step 3: Cross multiply
   680,400x = 1,491,696 × 1,491,696
4. Step 4: Simplify right side
   680,400x = 2,225,156,956,416
5. Step 5: Solve for x
   x = 2,225,156,956,416/680,400
6. Step 6: Final answer
   x = 3,270,365.90