Finding the Fourth Proportional to 2,619.78, 3,616.07 and 1,558.30

Step by Step Solution

1. Step 1: Write the proportion equation
   2,619.78 : 3,616.07 = 1,558.30 : x
2. Step 2: Convert to fraction form
   2,619.78/3,616.07 = 1,558.30/x
3. Step 3: Cross multiply
   2,619.78x = 3,616.07 × 1,558.30
4. Step 4: Simplify right side
   2,619.78x = 5,634,920.59
5. Step 5: Solve for x
   x = 5,634,920.59/2,619.78
6. Step 6: Final answer
   x = 2,150.91