Finding the Fourth Proportional to 3,100.79, 4,282.80 and 2,260.15

Step by Step Solution

1. Step 1: Write the proportion equation
   3,100.79 : 4,282.80 = 2,260.15 : x
2. Step 2: Convert to fraction form
   3,100.79/4,282.80 = 2,260.15/x
3. Step 3: Cross multiply
   3,100.79x = 4,282.80 × 2,260.15
4. Step 4: Simplify right side
   3,100.79x = 9,679,770.42
5. Step 5: Solve for x
   x = 9,679,770.42/3,100.79
6. Step 6: Final answer
   x = 3,121.71