Finding the Fourth Proportional to 2,616.08, 3,920.72 and 1,997.52

Step by Step Solution

1. Step 1: Write the proportion equation
   2,616.08 : 3,920.72 = 1,997.52 : x
2. Step 2: Convert to fraction form
   2,616.08/3,920.72 = 1,997.52/x
3. Step 3: Cross multiply
   2,616.08x = 3,920.72 × 1,997.52
4. Step 4: Simplify right side
   2,616.08x = 7,831,716.61
5. Step 5: Solve for x
   x = 7,831,716.61/2,616.08
6. Step 6: Final answer
   x = 2,993.68