Finding the Fourth Proportional to 11,918.72, 16,465.20 and 8,792.12

Step by Step Solution

1. Step 1: Write the proportion equation
   11,918.72 : 16,465.20 = 8,792.12 : x
2. Step 2: Convert to fraction form
   11,918.72/16,465.20 = 8,792.12/x
3. Step 3: Cross multiply
   11,918.72x = 16,465.20 × 8,792.12
4. Step 4: Simplify right side
   11,918.72x = 144,764,014.22
5. Step 5: Solve for x
   x = 144,764,014.22/11,918.72
6. Step 6: Final answer
   x = 12,145.94