Finding the Fourth Proportional to 10,888, 16,282.16 and 8,116.56

Step by Step Solution

1. Step 1: Write the proportion equation
   10,888 : 16,282.16 = 8,116.56 : x
2. Step 2: Convert to fraction form
   10,888/16,282.16 = 8,116.56/x
3. Step 3: Cross multiply
   10,888x = 16,282.16 × 8,116.56
4. Step 4: Simplify right side
   10,888x = 132,155,128.57
5. Step 5: Solve for x
   x = 132,155,128.57/10,888
6. Step 6: Final answer
   x = 12,137.69