Finding the Third Proportional to 988,480 and 2,158,238

Step by Step Solution

1. Step 1: Write the proportion equation
   988,480 : 2,158,238 = 2,158,238 : x
2. Step 2: Convert to fraction form
   988,480/2,158,238 = 2,158,238/x
3. Step 3: Cross multiply
   988,480x = 2,158,238 × 2,158,238
4. Step 4: Simplify right side
   988,480x = 4,657,991,264,644
5. Step 5: Solve for x
   x = 4,657,991,264,644/988,480
6. Step 6: Final answer
   x = 4,712,276.69