Finding the Fourth Proportional to 2,616.52, 3,924.72 and 1,317.64

Step by Step Solution

1. Step 1: Write the proportion equation
   2,616.52 : 3,924.72 = 1,317.64 : x
2. Step 2: Convert to fraction form
   2,616.52/3,924.72 = 1,317.64/x
3. Step 3: Cross multiply
   2,616.52x = 3,924.72 × 1,317.64
4. Step 4: Simplify right side
   2,616.52x = 5,171,368.06
5. Step 5: Solve for x
   x = 5,171,368.06/2,616.52
6. Step 6: Final answer
   x = 1,976.43