Finding the Third Proportional to 820,280 and 1,284,182

Step by Step Solution

1. Step 1: Write the proportion equation
   820,280 : 1,284,182 = 1,284,182 : x
2. Step 2: Convert to fraction form
   820,280/1,284,182 = 1,284,182/x
3. Step 3: Cross multiply
   820,280x = 1,284,182 × 1,284,182
4. Step 4: Simplify right side
   820,280x = 1,649,123,409,124
5. Step 5: Solve for x
   x = 1,649,123,409,124/820,280
6. Step 6: Final answer
   x = 2,010,439.62