Finding the Fourth Proportional to 2,222.16, 3,333.15 and 578.67

Step by Step Solution

1. Step 1: Write the proportion equation
   2,222.16 : 3,333.15 = 578.67 : x
2. Step 2: Convert to fraction form
   2,222.16/3,333.15 = 578.67/x
3. Step 3: Cross multiply
   2,222.16x = 3,333.15 × 578.67
4. Step 4: Simplify right side
   2,222.16x = 1,928,793.91
5. Step 5: Solve for x
   x = 1,928,793.91/2,222.16
6. Step 6: Final answer
   x = 867.98