Finding the Fourth Proportional to 3,720.96, 5,603.72 and 3,388.81

Step by Step Solution

1. Step 1: Write the proportion equation
   3,720.96 : 5,603.72 = 3,388.81 : x
2. Step 2: Convert to fraction form
   3,720.96/5,603.72 = 3,388.81/x
3. Step 3: Cross multiply
   3,720.96x = 5,603.72 × 3,388.81
4. Step 4: Simplify right side
   3,720.96x = 18,989,942.37
5. Step 5: Solve for x
   x = 18,989,942.37/3,720.96
6. Step 6: Final answer
   x = 5,103.51