Finding the Fourth Proportional to 3,280.14, 4,528.28 and 2,223.50

Step by Step Solution

1. Step 1: Write the proportion equation
   3,280.14 : 4,528.28 = 2,223.50 : x
2. Step 2: Convert to fraction form
   3,280.14/4,528.28 = 2,223.50/x
3. Step 3: Cross multiply
   3,280.14x = 4,528.28 × 2,223.50
4. Step 4: Simplify right side
   3,280.14x = 10,068,596.82
5. Step 5: Solve for x
   x = 10,068,596.82/3,280.14
6. Step 6: Final answer
   x = 3,069.56