Finding the Fourth Proportional to 2,808,078.10, 4,212,117.15 and 1,390,902.10

Step by Step Solution

1. Step 1: Write the proportion equation
   2,808,078.10 : 4,212,117.15 = 1,390,902.10 : x
2. Step 2: Convert to fraction form
   2,808,078.10/4,212,117.15 = 1,390,902.10/x
3. Step 3: Cross multiply
   2,808,078.10x = 4,212,117.15 × 1,390,902.10
4. Step 4: Simplify right side
   2,808,078.10x = 5,858,642,589,381.02
5. Step 5: Solve for x
   x = 5,858,642,589,381.02/2,808,078.10
6. Step 6: Final answer
   x = 2,086,353.15