Finding the Fourth Proportional to 3,910.53, 5,361.88 and 3,861.33

Step by Step Solution

1. Step 1: Write the proportion equation
   3,910.53 : 5,361.88 = 3,861.33 : x
2. Step 2: Convert to fraction form
   3,910.53/5,361.88 = 3,861.33/x
3. Step 3: Cross multiply
   3,910.53x = 5,361.88 × 3,861.33
4. Step 4: Simplify right side
   3,910.53x = 20,703,988.10
5. Step 5: Solve for x
   x = 20,703,988.10/3,910.53
6. Step 6: Final answer
   x = 5,294.42