Finding the Fourth Proportional to 5,079.31, 7,008.88 and 2,840.82

Step by Step Solution

1. Step 1: Write the proportion equation
   5,079.31 : 7,008.88 = 2,840.82 : x
2. Step 2: Convert to fraction form
   5,079.31/7,008.88 = 2,840.82/x
3. Step 3: Cross multiply
   5,079.31x = 7,008.88 × 2,840.82
4. Step 4: Simplify right side
   5,079.31x = 19,910,977.85
5. Step 5: Solve for x
   x = 19,910,977.85/5,079.31
6. Step 6: Final answer
   x = 3,920.02