Finding the Fourth Proportional to 11,375.48, 17,123.57 and 8,111.16

Step by Step Solution

1. Step 1: Write the proportion equation
   11,375.48 : 17,123.57 = 8,111.16 : x
2. Step 2: Convert to fraction form
   11,375.48/17,123.57 = 8,111.16/x
3. Step 3: Cross multiply
   11,375.48x = 17,123.57 × 8,111.16
4. Step 4: Simplify right side
   11,375.48x = 138,892,016.04
5. Step 5: Solve for x
   x = 138,892,016.04/11,375.48
6. Step 6: Final answer
   x = 12,209.77