Finding the Fourth Proportional to 8,573.68, 12,861.78 and 3,378.16

Step by Step Solution

1. Step 1: Write the proportion equation
   8,573.68 : 12,861.78 = 3,378.16 : x
2. Step 2: Convert to fraction form
   8,573.68/12,861.78 = 3,378.16/x
3. Step 3: Cross multiply
   8,573.68x = 12,861.78 × 3,378.16
4. Step 4: Simplify right side
   8,573.68x = 43,449,150.72
5. Step 5: Solve for x
   x = 43,449,150.72/8,573.68
6. Step 6: Final answer
   x = 5,067.74