Finding the Fourth Proportional to 2,860.32, 4,288.46 and 1,216.02

Step by Step Solution

1. Step 1: Write the proportion equation
   2,860.32 : 4,288.46 = 1,216.02 : x
2. Step 2: Convert to fraction form
   2,860.32/4,288.46 = 1,216.02/x
3. Step 3: Cross multiply
   2,860.32x = 4,288.46 × 1,216.02
4. Step 4: Simplify right side
   2,860.32x = 5,214,847.05
5. Step 5: Solve for x
   x = 5,214,847.05/2,860.32
6. Step 6: Final answer
   x = 1,823.17