Finding the Fourth Proportional to 12,899.37, 17,793.58 and 8,111.73

Step by Step Solution

1. Step 1: Write the proportion equation
   12,899.37 : 17,793.58 = 8,111.73 : x
2. Step 2: Convert to fraction form
   12,899.37/17,793.58 = 8,111.73/x
3. Step 3: Cross multiply
   12,899.37x = 17,793.58 × 8,111.73
4. Step 4: Simplify right side
   12,899.37x = 144,336,716.69
5. Step 5: Solve for x
   x = 144,336,716.69/12,899.37
6. Step 6: Final answer
   x = 11,189.44