Finding the Fourth Proportional to 11,287.89, 16,932.42 and 7,131.33

Step by Step Solution

1. Step 1: Write the proportion equation
   11,287.89 : 16,932.42 = 7,131.33 : x
2. Step 2: Convert to fraction form
   11,287.89/16,932.42 = 7,131.33/x
3. Step 3: Cross multiply
   11,287.89x = 16,932.42 × 7,131.33
4. Step 4: Simplify right side
   11,287.89x = 120,750,674.72
5. Step 5: Solve for x
   x = 120,750,674.72/11,287.89
6. Step 6: Final answer
   x = 10,697.36