Finding the Fourth Proportional to 4,050.05, 5,580.74 and 3,105.80

Step by Step Solution

1. Step 1: Write the proportion equation
   4,050.05 : 5,580.74 = 3,105.80 : x
2. Step 2: Convert to fraction form
   4,050.05/5,580.74 = 3,105.80/x
3. Step 3: Cross multiply
   4,050.05x = 5,580.74 × 3,105.80
4. Step 4: Simplify right side
   4,050.05x = 17,332,618.86
5. Step 5: Solve for x
   x = 17,332,618.86/4,050.05
6. Step 6: Final answer
   x = 4,279.61