Finding the Fourth Proportional to 3,881.24, 5,818.79 and 3,616.75

Step by Step Solution

1. Step 1: Write the proportion equation
   3,881.24 : 5,818.79 = 3,616.75 : x
2. Step 2: Convert to fraction form
   3,881.24/5,818.79 = 3,616.75/x
3. Step 3: Cross multiply
   3,881.24x = 5,818.79 × 3,616.75
4. Step 4: Simplify right side
   3,881.24x = 21,045,104.70
5. Step 5: Solve for x
   x = 21,045,104.70/3,881.24
6. Step 6: Final answer
   x = 5,422.26