Finding the Fourth Proportional to 2,620.81, 3,616.05 and 1,558.51

Step by Step Solution

1. Step 1: Write the proportion equation
   2,620.81 : 3,616.05 = 1,558.51 : x
2. Step 2: Convert to fraction form
   2,620.81/3,616.05 = 1,558.51/x
3. Step 3: Cross multiply
   2,620.81x = 3,616.05 × 1,558.51
4. Step 4: Simplify right side
   2,620.81x = 5,635,650.09
5. Step 5: Solve for x
   x = 5,635,650.09/2,620.81
6. Step 6: Final answer
   x = 2,150.35