Finding the Third Proportional to 988,488 and 2,158,254

Step by Step Solution

1. Step 1: Write the proportion equation
   988,488 : 2,158,254 = 2,158,254 : x
2. Step 2: Convert to fraction form
   988,488/2,158,254 = 2,158,254/x
3. Step 3: Cross multiply
   988,488x = 2,158,254 × 2,158,254
4. Step 4: Simplify right side
   988,488x = 4,658,060,328,516
5. Step 5: Solve for x
   x = 4,658,060,328,516/988,488
6. Step 6: Final answer
   x = 4,712,308.42