Finding the Third Proportional to 1,405,842 and 2,178,748

Step by Step Solution

1. Step 1: Write the proportion equation
   1,405,842 : 2,178,748 = 2,178,748 : x
2. Step 2: Convert to fraction form
   1,405,842/2,178,748 = 2,178,748/x
3. Step 3: Cross multiply
   1,405,842x = 2,178,748 × 2,178,748
4. Step 4: Simplify right side
   1,405,842x = 4,746,942,847,504
5. Step 5: Solve for x
   x = 4,746,942,847,504/1,405,842
6. Step 6: Final answer
   x = 3,376,583.46