Finding the Fourth Proportional to 10,817.82, 16,177.31 and 7,866.18

Step by Step Solution

1. Step 1: Write the proportion equation
   10,817.82 : 16,177.31 = 7,866.18 : x
2. Step 2: Convert to fraction form
   10,817.82/16,177.31 = 7,866.18/x
3. Step 3: Cross multiply
   10,817.82x = 16,177.31 × 7,866.18
4. Step 4: Simplify right side
   10,817.82x = 127,253,632.38
5. Step 5: Solve for x
   x = 127,253,632.38/10,817.82
6. Step 6: Final answer
   x = 11,763.33