Finding the Fourth Proportional to 11,700.99, 16,155.11 and 7,231.31

Step by Step Solution

1. Step 1: Write the proportion equation
   11,700.99 : 16,155.11 = 7,231.31 : x
2. Step 2: Convert to fraction form
   11,700.99/16,155.11 = 7,231.31/x
3. Step 3: Cross multiply
   11,700.99x = 16,155.11 × 7,231.31
4. Step 4: Simplify right side
   11,700.99x = 116,822,608.49
5. Step 5: Solve for x
   x = 116,822,608.49/11,700.99
6. Step 6: Final answer
   x = 9,983.99