Finding the Fourth Proportional to 2,079.77, 2,870.09 and 1,135.57

Step by Step Solution

1. Step 1: Write the proportion equation
   2,079.77 : 2,870.09 = 1,135.57 : x
2. Step 2: Convert to fraction form
   2,079.77/2,870.09 = 1,135.57/x
3. Step 3: Cross multiply
   2,079.77x = 2,870.09 × 1,135.57
4. Step 4: Simplify right side
   2,079.77x = 3,259,188.10
5. Step 5: Solve for x
   x = 3,259,188.10/2,079.77
6. Step 6: Final answer
   x = 1,567.09