Finding the Fourth Proportional to 2,621.28, 3,616.56 and 1,572.24

Step by Step Solution

1. Step 1: Write the proportion equation
   2,621.28 : 3,616.56 = 1,572.24 : x
2. Step 2: Convert to fraction form
   2,621.28/3,616.56 = 1,572.24/x
3. Step 3: Cross multiply
   2,621.28x = 3,616.56 × 1,572.24
4. Step 4: Simplify right side
   2,621.28x = 5,686,100.29
5. Step 5: Solve for x
   x = 5,686,100.29/2,621.28
6. Step 6: Final answer
   x = 2,169.21