Finding the Fourth Proportional to 2,620.54, 3,616.25 and 1,558.31

Step by Step Solution

1. Step 1: Write the proportion equation
   2,620.54 : 3,616.25 = 1,558.31 : x
2. Step 2: Convert to fraction form
   2,620.54/3,616.25 = 1,558.31/x
3. Step 3: Cross multiply
   2,620.54x = 3,616.25 × 1,558.31
4. Step 4: Simplify right side
   2,620.54x = 5,635,224.35
5. Step 5: Solve for x
   x = 5,635,224.35/2,620.54
6. Step 6: Final answer
   x = 2,150.41