Finding the Fourth Proportional to 8,806.10, 12,152.72 and 4,827.21

Step by Step Solution

1. Step 1: Write the proportion equation
   8,806.10 : 12,152.72 = 4,827.21 : x
2. Step 2: Convert to fraction form
   8,806.10/12,152.72 = 4,827.21/x
3. Step 3: Cross multiply
   8,806.10x = 12,152.72 × 4,827.21
4. Step 4: Simplify right side
   8,806.10x = 58,663,743.58
5. Step 5: Solve for x
   x = 58,663,743.58/8,806.10
6. Step 6: Final answer
   x = 6,661.71