Finding the Fourth Proportional to 6,361.11, 8,778.78 and 3,528.76

Step by Step Solution

1. Step 1: Write the proportion equation
   6,361.11 : 8,778.78 = 3,528.76 : x
2. Step 2: Convert to fraction form
   6,361.11/8,778.78 = 3,528.76/x
3. Step 3: Cross multiply
   6,361.11x = 8,778.78 × 3,528.76
4. Step 4: Simplify right side
   6,361.11x = 30,978,185.77
5. Step 5: Solve for x
   x = 30,978,185.77/6,361.11
6. Step 6: Final answer
   x = 4,869.93