Finding the Fourth Proportional to 11,139.72, 16,775.69 and 9,696.30

Step by Step Solution

1. Step 1: Write the proportion equation
   11,139.72 : 16,775.69 = 9,696.30 : x
2. Step 2: Convert to fraction form
   11,139.72/16,775.69 = 9,696.30/x
3. Step 3: Cross multiply
   11,139.72x = 16,775.69 × 9,696.30
4. Step 4: Simplify right side
   11,139.72x = 162,662,122.95
5. Step 5: Solve for x
   x = 162,662,122.95/11,139.72
6. Step 6: Final answer
   x = 14,601.99