Finding the Fourth Proportional to 6,361.15, 8,778.43 and 3,528.61

Step by Step Solution

1. Step 1: Write the proportion equation
   6,361.15 : 8,778.43 = 3,528.61 : x
2. Step 2: Convert to fraction form
   6,361.15/8,778.43 = 3,528.61/x
3. Step 3: Cross multiply
   6,361.15x = 8,778.43 × 3,528.61
4. Step 4: Simplify right side
   6,361.15x = 30,975,667.88
5. Step 5: Solve for x
   x = 30,975,667.88/6,361.15
6. Step 6: Final answer
   x = 4,869.51