Finding the Third Proportional to 457,061 and 990,390

Step by Step Solution

1. Step 1: Write the proportion equation
   457,061 : 990,390 = 990,390 : x
2. Step 2: Convert to fraction form
   457,061/990,390 = 990,390/x
3. Step 3: Cross multiply
   457,061x = 990,390 × 990,390
4. Step 4: Simplify right side
   457,061x = 980,872,352,100
5. Step 5: Solve for x
   x = 980,872,352,100/457,061
6. Step 6: Final answer
   x = 2,146,042.55