Finding the Fourth Proportional to 2,392.33, 3,589.85 and 931.30

Step by Step Solution

1. Step 1: Write the proportion equation
   2,392.33 : 3,589.85 = 931.30 : x
2. Step 2: Convert to fraction form
   2,392.33/3,589.85 = 931.30/x
3. Step 3: Cross multiply
   2,392.33x = 3,589.85 × 931.30
4. Step 4: Simplify right side
   2,392.33x = 3,343,227.31
5. Step 5: Solve for x
   x = 3,343,227.31/2,392.33
6. Step 6: Final answer
   x = 1,397.48