Finding the Fourth Proportional to 3,173.60, 4,370.56 and 3,105.76

Step by Step Solution

1. Step 1: Write the proportion equation
   3,173.60 : 4,370.56 = 3,105.76 : x
2. Step 2: Convert to fraction form
   3,173.60/4,370.56 = 3,105.76/x
3. Step 3: Cross multiply
   3,173.60x = 4,370.56 × 3,105.76
4. Step 4: Simplify right side
   3,173.60x = 13,573,910.43
5. Step 5: Solve for x
   x = 13,573,910.43/3,173.60
6. Step 6: Final answer
   x = 4,277.13