Finding the Third Proportional to 986,680 and 2,155,984

Step by Step Solution

1. Step 1: Write the proportion equation
   986,680 : 2,155,984 = 2,155,984 : x
2. Step 2: Convert to fraction form
   986,680/2,155,984 = 2,155,984/x
3. Step 3: Cross multiply
   986,680x = 2,155,984 × 2,155,984
4. Step 4: Simplify right side
   986,680x = 4,648,267,008,256
5. Step 5: Solve for x
   x = 4,648,267,008,256/986,680
6. Step 6: Final answer
   x = 4,711,017.76