Finding the Third Proportional to 991,830 and 2,148,492

Step by Step Solution

1. Step 1: Write the proportion equation
   991,830 : 2,148,492 = 2,148,492 : x
2. Step 2: Convert to fraction form
   991,830/2,148,492 = 2,148,492/x
3. Step 3: Cross multiply
   991,830x = 2,148,492 × 2,148,492
4. Step 4: Simplify right side
   991,830x = 4,616,017,874,064
5. Step 5: Solve for x
   x = 4,616,017,874,064/991,830
6. Step 6: Final answer
   x = 4,654,041.39