Finding the Fourth Proportional to 2,486,705.96, 3,431,648.90 and 1,398,978.28

Step by Step Solution

1. Step 1: Write the proportion equation
   2,486,705.96 : 3,431,648.90 = 1,398,978.28 : x
2. Step 2: Convert to fraction form
   2,486,705.96/3,431,648.90 = 1,398,978.28/x
3. Step 3: Cross multiply
   2,486,705.96x = 3,431,648.90 × 1,398,978.28
4. Step 4: Simplify right side
   2,486,705.96x = 4,800,802,275,685.89
5. Step 5: Solve for x
   x = 4,800,802,275,685.89/2,486,705.96
6. Step 6: Final answer
   x = 1,930,587.03