Finding the Fourth Proportional to 8,890.72, 12,269.31 and 5,113.96

Step by Step Solution

1. Step 1: Write the proportion equation
   8,890.72 : 12,269.31 = 5,113.96 : x
2. Step 2: Convert to fraction form
   8,890.72/12,269.31 = 5,113.96/x
3. Step 3: Cross multiply
   8,890.72x = 12,269.31 × 5,113.96
4. Step 4: Simplify right side
   8,890.72x = 62,744,760.57
5. Step 5: Solve for x
   x = 62,744,760.57/8,890.72
6. Step 6: Final answer
   x = 7,057.33