Finding the Fourth Proportional to 2,616.82, 3,921.67 and 1,445.08

Step by Step Solution

1. Step 1: Write the proportion equation
   2,616.82 : 3,921.67 = 1,445.08 : x
2. Step 2: Convert to fraction form
   2,616.82/3,921.67 = 1,445.08/x
3. Step 3: Cross multiply
   2,616.82x = 3,921.67 × 1,445.08
4. Step 4: Simplify right side
   2,616.82x = 5,667,126.88
5. Step 5: Solve for x
   x = 5,667,126.88/2,616.82
6. Step 6: Final answer
   x = 2,165.65