Finding the Fourth Proportional to 8,188.72, 12,285.51 and 3,808.78

Step by Step Solution

1. Step 1: Write the proportion equation
   8,188.72 : 12,285.51 = 3,808.78 : x
2. Step 2: Convert to fraction form
   8,188.72/12,285.51 = 3,808.78/x
3. Step 3: Cross multiply
   8,188.72x = 12,285.51 × 3,808.78
4. Step 4: Simplify right side
   8,188.72x = 46,792,724.31
5. Step 5: Solve for x
   x = 46,792,724.31/8,188.72
6. Step 6: Final answer
   x = 5,714.29