Finding the Fourth Proportional to 8,776.18, 12,111.42 and 5,238.92

Step by Step Solution

1. Step 1: Write the proportion equation
   8,776.18 : 12,111.42 = 5,238.92 : x
2. Step 2: Convert to fraction form
   8,776.18/12,111.42 = 5,238.92/x
3. Step 3: Cross multiply
   8,776.18x = 12,111.42 × 5,238.92
4. Step 4: Simplify right side
   8,776.18x = 63,450,760.47
5. Step 5: Solve for x
   x = 63,450,760.47/8,776.18
6. Step 6: Final answer
   x = 7,229.88