Finding the Fourth Proportional to 3,811.72, 5,274.52 and 3,251.28

Step by Step Solution

1. Step 1: Write the proportion equation
   3,811.72 : 5,274.52 = 3,251.28 : x
2. Step 2: Convert to fraction form
   3,811.72/5,274.52 = 3,251.28/x
3. Step 3: Cross multiply
   3,811.72x = 5,274.52 × 3,251.28
4. Step 4: Simplify right side
   3,811.72x = 17,148,941.39
5. Step 5: Solve for x
   x = 17,148,941.39/3,811.72
6. Step 6: Final answer
   x = 4,499.00