Finding the Fourth Proportional to 12,993.57, 19,488.33 and 4,228.43

Step by Step Solution

1. Step 1: Write the proportion equation
   12,993.57 : 19,488.33 = 4,228.43 : x
2. Step 2: Convert to fraction form
   12,993.57/19,488.33 = 4,228.43/x
3. Step 3: Cross multiply
   12,993.57x = 19,488.33 × 4,228.43
4. Step 4: Simplify right side
   12,993.57x = 82,404,941.78
5. Step 5: Solve for x
   x = 82,404,941.78/12,993.57
6. Step 6: Final answer
   x = 6,341.98