Finding the Fourth Proportional to 8,111.44, 12,210.21 and 5,787.55

Step by Step Solution

1. Step 1: Write the proportion equation
   8,111.44 : 12,210.21 = 5,787.55 : x
2. Step 2: Convert to fraction form
   8,111.44/12,210.21 = 5,787.55/x
3. Step 3: Cross multiply
   8,111.44x = 12,210.21 × 5,787.55
4. Step 4: Simplify right side
   8,111.44x = 70,667,216.15
5. Step 5: Solve for x
   x = 70,667,216.15/8,111.44
6. Step 6: Final answer
   x = 8,712.04