Finding the Fourth Proportional to 3,908.42, 5,862.61 and 3,680.16

Step by Step Solution

1. Step 1: Write the proportion equation
   3,908.42 : 5,862.61 = 3,680.16 : x
2. Step 2: Convert to fraction form
   3,908.42/5,862.61 = 3,680.16/x
3. Step 3: Cross multiply
   3,908.42x = 5,862.61 × 3,680.16
4. Step 4: Simplify right side
   3,908.42x = 21,575,342.82
5. Step 5: Solve for x
   x = 21,575,342.82/3,908.42
6. Step 6: Final answer
   x = 5,520.22