Finding the Fourth Proportional to 2,327.57, 3,490.81 and 1,390.79

Step by Step Solution

1. Step 1: Write the proportion equation
   2,327.57 : 3,490.81 = 1,390.79 : x
2. Step 2: Convert to fraction form
   2,327.57/3,490.81 = 1,390.79/x
3. Step 3: Cross multiply
   2,327.57x = 3,490.81 × 1,390.79
4. Step 4: Simplify right side
   2,327.57x = 4,854,988.89
5. Step 5: Solve for x
   x = 4,854,988.89/2,327.57
6. Step 6: Final answer
   x = 2,085.87