Finding the Fourth Proportional to 5,649.36, 7,791.50 and 3,976.31

Step by Step Solution

1. Step 1: Write the proportion equation
   5,649.36 : 7,791.50 = 3,976.31 : x
2. Step 2: Convert to fraction form
   5,649.36/7,791.50 = 3,976.31/x
3. Step 3: Cross multiply
   5,649.36x = 7,791.50 × 3,976.31
4. Step 4: Simplify right side
   5,649.36x = 30,981,360.53
5. Step 5: Solve for x
   x = 30,981,360.53/5,649.36
6. Step 6: Final answer
   x = 5,484.05