Finding the Fourth Proportional to 12,568.85, 17,335.42 and 8,538.79

Step by Step Solution

1. Step 1: Write the proportion equation
   12,568.85 : 17,335.42 = 8,538.79 : x
2. Step 2: Convert to fraction form
   12,568.85/17,335.42 = 8,538.79/x
3. Step 3: Cross multiply
   12,568.85x = 17,335.42 × 8,538.79
4. Step 4: Simplify right side
   12,568.85x = 148,023,527.52
5. Step 5: Solve for x
   x = 148,023,527.52/12,568.85
6. Step 6: Final answer
   x = 11,777.01