Finding the Fourth Proportional to 3,188.42, 4,783.86 and 1,108.64

Step by Step Solution

1. Step 1: Write the proportion equation
   3,188.42 : 4,783.86 = 1,108.64 : x
2. Step 2: Convert to fraction form
   3,188.42/4,783.86 = 1,108.64/x
3. Step 3: Cross multiply
   3,188.42x = 4,783.86 × 1,108.64
4. Step 4: Simplify right side
   3,188.42x = 5,303,578.55
5. Step 5: Solve for x
   x = 5,303,578.55/3,188.42
6. Step 6: Final answer
   x = 1,663.39