Finding the Fourth Proportional to 2,860.32, 4,292.82 and 1,218.72

Step by Step Solution

1. Step 1: Write the proportion equation
   2,860.32 : 4,292.82 = 1,218.72 : x
2. Step 2: Convert to fraction form
   2,860.32/4,292.82 = 1,218.72/x
3. Step 3: Cross multiply
   2,860.32x = 4,292.82 × 1,218.72
4. Step 4: Simplify right side
   2,860.32x = 5,231,745.59
5. Step 5: Solve for x
   x = 5,231,745.59/2,860.32
6. Step 6: Final answer
   x = 1,829.08