Finding the Fourth Proportional to 3,997.31, 5,516.23 and 2,228.87

Step by Step Solution

1. Step 1: Write the proportion equation
   3,997.31 : 5,516.23 = 2,228.87 : x
2. Step 2: Convert to fraction form
   3,997.31/5,516.23 = 2,228.87/x
3. Step 3: Cross multiply
   3,997.31x = 5,516.23 × 2,228.87
4. Step 4: Simplify right side
   3,997.31x = 12,294,959.56
5. Step 5: Solve for x
   x = 12,294,959.56/3,997.31
6. Step 6: Final answer
   x = 3,075.81