Finding the Fourth Proportional to 2,391.34, 3,588.98 and 1,222.20

Step by Step Solution

1. Step 1: Write the proportion equation
   2,391.34 : 3,588.98 = 1,222.20 : x
2. Step 2: Convert to fraction form
   2,391.34/3,588.98 = 1,222.20/x
3. Step 3: Cross multiply
   2,391.34x = 3,588.98 × 1,222.20
4. Step 4: Simplify right side
   2,391.34x = 4,386,451.36
5. Step 5: Solve for x
   x = 4,386,451.36/2,391.34
6. Step 6: Final answer
   x = 1,834.31