Finding the Third Proportional to 646,290 and 1,380,552

Step by Step Solution

1. Step 1: Write the proportion equation
   646,290 : 1,380,552 = 1,380,552 : x
2. Step 2: Convert to fraction form
   646,290/1,380,552 = 1,380,552/x
3. Step 3: Cross multiply
   646,290x = 1,380,552 × 1,380,552
4. Step 4: Simplify right side
   646,290x = 1,905,923,824,704
5. Step 5: Solve for x
   x = 1,905,923,824,704/646,290
6. Step 6: Final answer
   x = 2,949,022.61