Finding the Fourth Proportional to 11,640.42, 16,062.84 and 8,111.25

Step by Step Solution

1. Step 1: Write the proportion equation
   11,640.42 : 16,062.84 = 8,111.25 : x
2. Step 2: Convert to fraction form
   11,640.42/16,062.84 = 8,111.25/x
3. Step 3: Cross multiply
   11,640.42x = 16,062.84 × 8,111.25
4. Step 4: Simplify right side
   11,640.42x = 130,289,710.95
5. Step 5: Solve for x
   x = 130,289,710.95/11,640.42
6. Step 6: Final answer
   x = 11,192.87