Finding the Fourth Proportional to 5,608.78, 7,738.50 and 3,620.46

Step by Step Solution

1. Step 1: Write the proportion equation
   5,608.78 : 7,738.50 = 3,620.46 : x
2. Step 2: Convert to fraction form
   5,608.78/7,738.50 = 3,620.46/x
3. Step 3: Cross multiply
   5,608.78x = 7,738.50 × 3,620.46
4. Step 4: Simplify right side
   5,608.78x = 28,016,972.31
5. Step 5: Solve for x
   x = 28,016,972.31/5,608.78
6. Step 6: Final answer
   x = 4,995.20