Finding the Fourth Proportional to 5,538.78, 8,308.78 and 2,419.67

Step by Step Solution

1. Step 1: Write the proportion equation
   5,538.78 : 8,308.78 = 2,419.67 : x
2. Step 2: Convert to fraction form
   5,538.78/8,308.78 = 2,419.67/x
3. Step 3: Cross multiply
   5,538.78x = 8,308.78 × 2,419.67
4. Step 4: Simplify right side
   5,538.78x = 20,104,520.43
5. Step 5: Solve for x
   x = 20,104,520.43/5,538.78
6. Step 6: Final answer
   x = 3,629.77