Finding the Fourth Proportional to 2,147.29, 3,216.37 and 1,222.37

Step by Step Solution

1. Step 1: Write the proportion equation
   2,147.29 : 3,216.37 = 1,222.37 : x
2. Step 2: Convert to fraction form
   2,147.29/3,216.37 = 1,222.37/x
3. Step 3: Cross multiply
   2,147.29x = 3,216.37 × 1,222.37
4. Step 4: Simplify right side
   2,147.29x = 3,931,594.20
5. Step 5: Solve for x
   x = 3,931,594.20/2,147.29
6. Step 6: Final answer
   x = 1,830.96