Finding the Fourth Proportional to 3,929.98, 5,422.98 and 2,228.57

Step by Step Solution

1. Step 1: Write the proportion equation
   3,929.98 : 5,422.98 = 2,228.57 : x
2. Step 2: Convert to fraction form
   3,929.98/5,422.98 = 2,228.57/x
3. Step 3: Cross multiply
   3,929.98x = 5,422.98 × 2,228.57
4. Step 4: Simplify right side
   3,929.98x = 12,085,452.28
5. Step 5: Solve for x
   x = 12,085,452.28/3,929.98
6. Step 6: Final answer
   x = 3,075.19