Finding the Fourth Proportional to 3,131.10, 4,288.82 and 3,122.46

Step by Step Solution

1. Step 1: Write the proportion equation
   3,131.10 : 4,288.82 = 3,122.46 : x
2. Step 2: Convert to fraction form
   3,131.10/4,288.82 = 3,122.46/x
3. Step 3: Cross multiply
   3,131.10x = 4,288.82 × 3,122.46
4. Step 4: Simplify right side
   3,131.10x = 13,391,653.28
5. Step 5: Solve for x
   x = 13,391,653.28/3,131.10
6. Step 6: Final answer
   x = 4,276.98