Finding the Fourth Proportional to 2,865.71, 4,298.79 and 1,222.28

Step by Step Solution

1. Step 1: Write the proportion equation
   2,865.71 : 4,298.79 = 1,222.28 : x
2. Step 2: Convert to fraction form
   2,865.71/4,298.79 = 1,222.28/x
3. Step 3: Cross multiply
   2,865.71x = 4,298.79 × 1,222.28
4. Step 4: Simplify right side
   2,865.71x = 5,254,303.55
5. Step 5: Solve for x
   x = 5,254,303.55/2,865.71
6. Step 6: Final answer
   x = 1,833.51