Finding the Fourth Proportional to 2,489.50, 3,436.59 and 1,558.54

Step by Step Solution

1. Step 1: Write the proportion equation
   2,489.50 : 3,436.59 = 1,558.54 : x
2. Step 2: Convert to fraction form
   2,489.50/3,436.59 = 1,558.54/x
3. Step 3: Cross multiply
   2,489.50x = 3,436.59 × 1,558.54
4. Step 4: Simplify right side
   2,489.50x = 5,356,062.98
5. Step 5: Solve for x
   x = 5,356,062.98/2,489.50
6. Step 6: Final answer
   x = 2,151.46