Finding the Third Proportional to 917,870 and 1,988,282

Step by Step Solution

1. Step 1: Write the proportion equation
   917,870 : 1,988,282 = 1,988,282 : x
2. Step 2: Convert to fraction form
   917,870/1,988,282 = 1,988,282/x
3. Step 3: Cross multiply
   917,870x = 1,988,282 × 1,988,282
4. Step 4: Simplify right side
   917,870x = 3,953,265,311,524
5. Step 5: Solve for x
   x = 3,953,265,311,524/917,870
6. Step 6: Final answer
   x = 4,306,999.15