Finding the Fourth Proportional to 11,875.28, 16,389.42 and 7,162.16

Step by Step Solution

1. Step 1: Write the proportion equation
   11,875.28 : 16,389.42 = 7,162.16 : x
2. Step 2: Convert to fraction form
   11,875.28/16,389.42 = 7,162.16/x
3. Step 3: Cross multiply
   11,875.28x = 16,389.42 × 7,162.16
4. Step 4: Simplify right side
   11,875.28x = 117,383,648.35
5. Step 5: Solve for x
   x = 117,383,648.35/11,875.28
6. Step 6: Final answer
   x = 9,884.71