Finding the Fourth Proportional to 2,070.59, 2,857.41 and 1,139.09

Step by Step Solution

1. Step 1: Write the proportion equation
   2,070.59 : 2,857.41 = 1,139.09 : x
2. Step 2: Convert to fraction form
   2,070.59/2,857.41 = 1,139.09/x
3. Step 3: Cross multiply
   2,070.59x = 2,857.41 × 1,139.09
4. Step 4: Simplify right side
   2,070.59x = 3,254,832.87
5. Step 5: Solve for x
   x = 3,254,832.87/2,070.59
6. Step 6: Final answer
   x = 1,571.94