Finding the Fourth Proportional to 2,223.62, 3,331.29 and 1,390.94

Step by Step Solution

1. Step 1: Write the proportion equation
   2,223.62 : 3,331.29 = 1,390.94 : x
2. Step 2: Convert to fraction form
   2,223.62/3,331.29 = 1,390.94/x
3. Step 3: Cross multiply
   2,223.62x = 3,331.29 × 1,390.94
4. Step 4: Simplify right side
   2,223.62x = 4,633,624.51
5. Step 5: Solve for x
   x = 4,633,624.51/2,223.62
6. Step 6: Final answer
   x = 2,083.82