Finding the Fourth Proportional to 4,076.15, 5,616.68 and 3,131.89

Step by Step Solution

1. Step 1: Write the proportion equation
   4,076.15 : 5,616.68 = 3,131.89 : x
2. Step 2: Convert to fraction form
   4,076.15/5,616.68 = 3,131.89/x
3. Step 3: Cross multiply
   4,076.15x = 5,616.68 × 3,131.89
4. Step 4: Simplify right side
   4,076.15x = 17,590,794.22
5. Step 5: Solve for x
   x = 17,590,794.22/4,076.15
6. Step 6: Final answer
   x = 4,315.55