Finding the Fourth Proportional to 3,880.82, 5,355.98 and 2,308.90

Step by Step Solution

1. Step 1: Write the proportion equation
   3,880.82 : 5,355.98 = 2,308.90 : x
2. Step 2: Convert to fraction form
   3,880.82/5,355.98 = 2,308.90/x
3. Step 3: Cross multiply
   3,880.82x = 5,355.98 × 2,308.90
4. Step 4: Simplify right side
   3,880.82x = 12,366,422.22
5. Step 5: Solve for x
   x = 12,366,422.22/3,880.82
6. Step 6: Final answer
   x = 3,186.55