Finding the Third Proportional to 2,043,840 and 4,218,880

Step by Step Solution

1. Step 1: Write the proportion equation
   2,043,840 : 4,218,880 = 4,218,880 : x
2. Step 2: Convert to fraction form
   2,043,840/4,218,880 = 4,218,880/x
3. Step 3: Cross multiply
   2,043,840x = 4,218,880 × 4,218,880
4. Step 4: Simplify right side
   2,043,840x = 17,798,948,454,400
5. Step 5: Solve for x
   x = 17,798,948,454,400/2,043,840
6. Step 6: Final answer
   x = 8,708,582.11