Finding the Fourth Proportional to 2,391.21, 3,585.33 and 930.03

Step by Step Solution

1. Step 1: Write the proportion equation
   2,391.21 : 3,585.33 = 930.03 : x
2. Step 2: Convert to fraction form
   2,391.21/3,585.33 = 930.03/x
3. Step 3: Cross multiply
   2,391.21x = 3,585.33 × 930.03
4. Step 4: Simplify right side
   2,391.21x = 3,334,464.46
5. Step 5: Solve for x
   x = 3,334,464.46/2,391.21
6. Step 6: Final answer
   x = 1,394.47