Finding the Fourth Proportional to 11,802.72, 16,285.69 and 7,087.11

Step by Step Solution

1. Step 1: Write the proportion equation
   11,802.72 : 16,285.69 = 7,087.11 : x
2. Step 2: Convert to fraction form
   11,802.72/16,285.69 = 7,087.11/x
3. Step 3: Cross multiply
   11,802.72x = 16,285.69 × 7,087.11
4. Step 4: Simplify right side
   11,802.72x = 115,418,476.46
5. Step 5: Solve for x
   x = 115,418,476.46/11,802.72
6. Step 6: Final answer
   x = 9,778.97