Finding the Fourth Proportional to 3,880.71, 5,356.94 and 2,308.50

Step by Step Solution

1. Step 1: Write the proportion equation
   3,880.71 : 5,356.94 = 2,308.50 : x
2. Step 2: Convert to fraction form
   3,880.71/5,356.94 = 2,308.50/x
3. Step 3: Cross multiply
   3,880.71x = 5,356.94 × 2,308.50
4. Step 4: Simplify right side
   3,880.71x = 12,366,484.45
5. Step 5: Solve for x
   x = 12,366,484.45/3,880.71
6. Step 6: Final answer
   x = 3,186.66