Finding the Fourth Proportional to 2,290.10, 3,436.50 and 903.57

Step by Step Solution

1. Step 1: Write the proportion equation
   2,290.10 : 3,436.50 = 903.57 : x
2. Step 2: Convert to fraction form
   2,290.10/3,436.50 = 903.57/x
3. Step 3: Cross multiply
   2,290.10x = 3,436.50 × 903.57
4. Step 4: Simplify right side
   2,290.10x = 3,105,118.31
5. Step 5: Solve for x
   x = 3,105,118.31/2,290.10
6. Step 6: Final answer
   x = 1,355.89