Finding the Fourth Proportional to 12,851.92, 17,735.52 and 8,140.06

Step by Step Solution

1. Step 1: Write the proportion equation
   12,851.92 : 17,735.52 = 8,140.06 : x
2. Step 2: Convert to fraction form
   12,851.92/17,735.52 = 8,140.06/x
3. Step 3: Cross multiply
   12,851.92x = 17,735.52 × 8,140.06
4. Step 4: Simplify right side
   12,851.92x = 144,368,196.93
5. Step 5: Solve for x
   x = 144,368,196.93/12,851.92
6. Step 6: Final answer
   x = 11,233.20