Finding the Fourth Proportional to 12,885.85, 17,786.42 and 7,509.88

Step by Step Solution

1. Step 1: Write the proportion equation
   12,885.85 : 17,786.42 = 7,509.88 : x
2. Step 2: Convert to fraction form
   12,885.85/17,786.42 = 7,509.88/x
3. Step 3: Cross multiply
   12,885.85x = 17,786.42 × 7,509.88
4. Step 4: Simplify right side
   12,885.85x = 133,573,879.83
5. Step 5: Solve for x
   x = 133,573,879.83/12,885.85
6. Step 6: Final answer
   x = 10,365.93