Finding the Fourth Proportional to 3,608.30, 5,388.38 and 3,423.78

Step by Step Solution

1. Step 1: Write the proportion equation
   3,608.30 : 5,388.38 = 3,423.78 : x
2. Step 2: Convert to fraction form
   3,608.30/5,388.38 = 3,423.78/x
3. Step 3: Cross multiply
   3,608.30x = 5,388.38 × 3,423.78
4. Step 4: Simplify right side
   3,608.30x = 18,448,610.56
5. Step 5: Solve for x
   x = 18,448,610.56/3,608.30
6. Step 6: Final answer
   x = 5,112.83