Finding the Fourth Proportional to 5,117.72, 7,061.94 and 2,879.55

Step by Step Solution

1. Step 1: Write the proportion equation
   5,117.72 : 7,061.94 = 2,879.55 : x
2. Step 2: Convert to fraction form
   5,117.72/7,061.94 = 2,879.55/x
3. Step 3: Cross multiply
   5,117.72x = 7,061.94 × 2,879.55
4. Step 4: Simplify right side
   5,117.72x = 20,335,209.33
5. Step 5: Solve for x
   x = 20,335,209.33/5,117.72
6. Step 6: Final answer
   x = 3,973.49