Finding the Fourth Proportional to 2,879,574, 4,320,071.43 and 857,810.05

Step by Step Solution

1. Step 1: Write the proportion equation
   2,879,574 : 4,320,071.43 = 857,810.05 : x
2. Step 2: Convert to fraction form
   2,879,574/4,320,071.43 = 857,810.05/x
3. Step 3: Cross multiply
   2,879,574x = 4,320,071.43 × 857,810.05
4. Step 4: Simplify right side
   2,879,574x = 3,705,800,697,988.75
5. Step 5: Solve for x
   x = 3,705,800,697,988.75/2,879,574
6. Step 6: Final answer
   x = 1,286,926.71