Finding the Fourth Proportional to 2,859.98, 4,289.61 and 1,216.22

Step by Step Solution

1. Step 1: Write the proportion equation
   2,859.98 : 4,289.61 = 1,216.22 : x
2. Step 2: Convert to fraction form
   2,859.98/4,289.61 = 1,216.22/x
3. Step 3: Cross multiply
   2,859.98x = 4,289.61 × 1,216.22
4. Step 4: Simplify right side
   2,859.98x = 5,217,109.47
5. Step 5: Solve for x
   x = 5,217,109.47/2,859.98
6. Step 6: Final answer
   x = 1,824.18