Finding the Third Proportional to 988,220 and 2,157,156

Step by Step Solution

1. Step 1: Write the proportion equation
   988,220 : 2,157,156 = 2,157,156 : x
2. Step 2: Convert to fraction form
   988,220/2,157,156 = 2,157,156/x
3. Step 3: Cross multiply
   988,220x = 2,157,156 × 2,157,156
4. Step 4: Simplify right side
   988,220x = 4,653,322,008,336
5. Step 5: Solve for x
   x = 4,653,322,008,336/988,220
6. Step 6: Final answer
   x = 4,708,791.57