Finding the Third Proportional to 986,426 and 2,151,578

Step by Step Solution

1. Step 1: Write the proportion equation
   986,426 : 2,151,578 = 2,151,578 : x
2. Step 2: Convert to fraction form
   986,426/2,151,578 = 2,151,578/x
3. Step 3: Cross multiply
   986,426x = 2,151,578 × 2,151,578
4. Step 4: Simplify right side
   986,426x = 4,629,287,890,084
5. Step 5: Solve for x
   x = 4,629,287,890,084/986,426
6. Step 6: Final answer
   x = 4,692,990.54