Finding the Fourth Proportional to 12,111.71, 16,717.19 and 7,399.94

Step by Step Solution

1. Step 1: Write the proportion equation
   12,111.71 : 16,717.19 = 7,399.94 : x
2. Step 2: Convert to fraction form
   12,111.71/16,717.19 = 7,399.94/x
3. Step 3: Cross multiply
   12,111.71x = 16,717.19 × 7,399.94
4. Step 4: Simplify right side
   12,111.71x = 123,706,082.38
5. Step 5: Solve for x
   x = 123,706,082.38/12,111.71
6. Step 6: Final answer
   x = 10,213.76