Finding the Fourth Proportional to 5,673.92, 7,830.72 and 3,520.88

Step by Step Solution

1. Step 1: Write the proportion equation
   5,673.92 : 7,830.72 = 3,520.88 : x
2. Step 2: Convert to fraction form
   5,673.92/7,830.72 = 3,520.88/x
3. Step 3: Cross multiply
   5,673.92x = 7,830.72 × 3,520.88
4. Step 4: Simplify right side
   5,673.92x = 27,571,025.43
5. Step 5: Solve for x
   x = 27,571,025.43/5,673.92
6. Step 6: Final answer
   x = 4,859.26