Finding the Fourth Proportional to 1,879.52, 2,820.16 and 839.42

Step by Step Solution

1. Step 1: Write the proportion equation
   1,879.52 : 2,820.16 = 839.42 : x
2. Step 2: Convert to fraction form
   1,879.52/2,820.16 = 839.42/x
3. Step 3: Cross multiply
   1,879.52x = 2,820.16 × 839.42
4. Step 4: Simplify right side
   1,879.52x = 2,367,294.51
5. Step 5: Solve for x
   x = 2,367,294.51/1,879.52
6. Step 6: Final answer
   x = 1,259.52