Finding the Fourth Proportional to 10,804.28, 14,916.78 and 8,819.55

Step by Step Solution

1. Step 1: Write the proportion equation
   10,804.28 : 14,916.78 = 8,819.55 : x
2. Step 2: Convert to fraction form
   10,804.28/14,916.78 = 8,819.55/x
3. Step 3: Cross multiply
   10,804.28x = 14,916.78 × 8,819.55
4. Step 4: Simplify right side
   10,804.28x = 131,559,287.05
5. Step 5: Solve for x
   x = 131,559,287.05/10,804.28
6. Step 6: Final answer
   x = 12,176.60