Finding the Fourth Proportional to 4,072.72, 5,619.88 and 2,280.30

Step by Step Solution

1. Step 1: Write the proportion equation
   4,072.72 : 5,619.88 = 2,280.30 : x
2. Step 2: Convert to fraction form
   4,072.72/5,619.88 = 2,280.30/x
3. Step 3: Cross multiply
   4,072.72x = 5,619.88 × 2,280.30
4. Step 4: Simplify right side
   4,072.72x = 12,815,012.36
5. Step 5: Solve for x
   x = 12,815,012.36/4,072.72
6. Step 6: Final answer
   x = 3,146.55