Finding the Fourth Proportional to 5,116.86, 7,061.84 and 2,879.28

Step by Step Solution

1. Step 1: Write the proportion equation
   5,116.86 : 7,061.84 = 2,879.28 : x
2. Step 2: Convert to fraction form
   5,116.86/7,061.84 = 2,879.28/x
3. Step 3: Cross multiply
   5,116.86x = 7,061.84 × 2,879.28
4. Step 4: Simplify right side
   5,116.86x = 20,333,000.28
5. Step 5: Solve for x
   x = 20,333,000.28/5,116.86
6. Step 6: Final answer
   x = 3,973.73