Finding the Fourth Proportional to 12,835.20, 17,713.76 and 8,058.56

Step by Step Solution

1. Step 1: Write the proportion equation
   12,835.20 : 17,713.76 = 8,058.56 : x
2. Step 2: Convert to fraction form
   12,835.20/17,713.76 = 8,058.56/x
3. Step 3: Cross multiply
   12,835.20x = 17,713.76 × 8,058.56
4. Step 4: Simplify right side
   12,835.20x = 142,747,397.79
5. Step 5: Solve for x
   x = 142,747,397.79/12,835.20
6. Step 6: Final answer
   x = 11,121.56