Finding the Third Proportional to 988,218 and 2,157,144

Step by Step Solution

1. Step 1: Write the proportion equation
   988,218 : 2,157,144 = 2,157,144 : x
2. Step 2: Convert to fraction form
   988,218/2,157,144 = 2,157,144/x
3. Step 3: Cross multiply
   988,218x = 2,157,144 × 2,157,144
4. Step 4: Simplify right side
   988,218x = 4,653,270,236,736
5. Step 5: Solve for x
   x = 4,653,270,236,736/988,218
6. Step 6: Final answer
   x = 4,708,748.71