Finding the Third Proportional to 986,726 and 2,157,988

Step by Step Solution

1. Step 1: Write the proportion equation
   986,726 : 2,157,988 = 2,157,988 : x
2. Step 2: Convert to fraction form
   986,726/2,157,988 = 2,157,988/x
3. Step 3: Cross multiply
   986,726x = 2,157,988 × 2,157,988
4. Step 4: Simplify right side
   986,726x = 4,656,912,208,144
5. Step 5: Solve for x
   x = 4,656,912,208,144/986,726
6. Step 6: Final answer
   x = 4,719,559.64