Finding the Fourth Proportional to 2,860.76, 4,284.72 and 2,485.76

Step by Step Solution

1. Step 1: Write the proportion equation
   2,860.76 : 4,284.72 = 2,485.76 : x
2. Step 2: Convert to fraction form
   2,860.76/4,284.72 = 2,485.76/x
3. Step 3: Cross multiply
   2,860.76x = 4,284.72 × 2,485.76
4. Step 4: Simplify right side
   2,860.76x = 10,650,785.59
5. Step 5: Solve for x
   x = 10,650,785.59/2,860.76
6. Step 6: Final answer
   x = 3,723.06