Finding the Fourth Proportional to 5,180.72, 7,149.32 and 2,822.80

Step by Step Solution

1. Step 1: Write the proportion equation
   5,180.72 : 7,149.32 = 2,822.80 : x
2. Step 2: Convert to fraction form
   5,180.72/7,149.32 = 2,822.80/x
3. Step 3: Cross multiply
   5,180.72x = 7,149.32 × 2,822.80
4. Step 4: Simplify right side
   5,180.72x = 20,181,100.50
5. Step 5: Solve for x
   x = 20,181,100.50/5,180.72
6. Step 6: Final answer
   x = 3,895.42