Finding the Fourth Proportional to 2,079.86, 2,870.18 and 1,135.64

Step by Step Solution

1. Step 1: Write the proportion equation
   2,079.86 : 2,870.18 = 1,135.64 : x
2. Step 2: Convert to fraction form
   2,079.86/2,870.18 = 1,135.64/x
3. Step 3: Cross multiply
   2,079.86x = 2,870.18 × 1,135.64
4. Step 4: Simplify right side
   2,079.86x = 3,259,501.01
5. Step 5: Solve for x
   x = 3,259,501.01/2,079.86
6. Step 6: Final answer
   x = 1,567.18