Finding the Fourth Proportional to 3,930.55, 5,423.72 and 2,251.50

Step by Step Solution

1. Step 1: Write the proportion equation
   3,930.55 : 5,423.72 = 2,251.50 : x
2. Step 2: Convert to fraction form
   3,930.55/5,423.72 = 2,251.50/x
3. Step 3: Cross multiply
   3,930.55x = 5,423.72 × 2,251.50
4. Step 4: Simplify right side
   3,930.55x = 12,211,473.98
5. Step 5: Solve for x
   x = 12,211,473.98/3,930.55
6. Step 6: Final answer
   x = 3,106.81