Finding the Fourth Proportional to 2,290.79, 3,436.17 and 1,558.55

Step by Step Solution

1. Step 1: Write the proportion equation
   2,290.79 : 3,436.17 = 1,558.55 : x
2. Step 2: Convert to fraction form
   2,290.79/3,436.17 = 1,558.55/x
3. Step 3: Cross multiply
   2,290.79x = 3,436.17 × 1,558.55
4. Step 4: Simplify right side
   2,290.79x = 5,355,425.57
5. Step 5: Solve for x
   x = 5,355,425.57/2,290.79
6. Step 6: Final answer
   x = 2,337.81