Finding the Fourth Proportional to 3,919.72, 5,873.40 and 3,185.76

Step by Step Solution

1. Step 1: Write the proportion equation
   3,919.72 : 5,873.40 = 3,185.76 : x
2. Step 2: Convert to fraction form
   3,919.72/5,873.40 = 3,185.76/x
3. Step 3: Cross multiply
   3,919.72x = 5,873.40 × 3,185.76
4. Step 4: Simplify right side
   3,919.72x = 18,711,242.78
5. Step 5: Solve for x
   x = 18,711,242.78/3,919.72
6. Step 6: Final answer
   x = 4,773.62