Finding the Fourth Proportional to 2,290.89, 3,434.02 and 903.69

Step by Step Solution

1. Step 1: Write the proportion equation
   2,290.89 : 3,434.02 = 903.69 : x
2. Step 2: Convert to fraction form
   2,290.89/3,434.02 = 903.69/x
3. Step 3: Cross multiply
   2,290.89x = 3,434.02 × 903.69
4. Step 4: Simplify right side
   2,290.89x = 3,103,289.53
5. Step 5: Solve for x
   x = 3,103,289.53/2,290.89
6. Step 6: Final answer
   x = 1,354.62