Finding the Fourth Proportional to 3,993.90, 5,511.75 and 2,225.50

Step by Step Solution

1. Step 1: Write the proportion equation
   3,993.90 : 5,511.75 = 2,225.50 : x
2. Step 2: Convert to fraction form
   3,993.90/5,511.75 = 2,225.50/x
3. Step 3: Cross multiply
   3,993.90x = 5,511.75 × 2,225.50
4. Step 4: Simplify right side
   3,993.90x = 12,266,388.50
5. Step 5: Solve for x
   x = 12,266,388.50/3,993.90
6. Step 6: Final answer
   x = 3,071.28