Finding the Fourth Proportional to 3,981.72, 5,495.33 and 2,866.35

Step by Step Solution

1. Step 1: Write the proportion equation
   3,981.72 : 5,495.33 = 2,866.35 : x
2. Step 2: Convert to fraction form
   3,981.72/5,495.33 = 2,866.35/x
3. Step 3: Cross multiply
   3,981.72x = 5,495.33 × 2,866.35
4. Step 4: Simplify right side
   3,981.72x = 15,751,524.81
5. Step 5: Solve for x
   x = 15,751,524.81/3,981.72
6. Step 6: Final answer
   x = 3,955.96