Finding the Fourth Proportional to 5,673.69, 7,829.78 and 3,155.91

Step by Step Solution

1. Step 1: Write the proportion equation
   5,673.69 : 7,829.78 = 3,155.91 : x
2. Step 2: Convert to fraction form
   5,673.69/7,829.78 = 3,155.91/x
3. Step 3: Cross multiply
   5,673.69x = 7,829.78 × 3,155.91
4. Step 4: Simplify right side
   5,673.69x = 24,710,081.00
5. Step 5: Solve for x
   x = 24,710,081.00/5,673.69
6. Step 6: Final answer
   x = 4,355.20