Finding the Fourth Proportional to 12,945.24, 17,870.45 and 9,759.83

Step by Step Solution

1. Step 1: Write the proportion equation
   12,945.24 : 17,870.45 = 9,759.83 : x
2. Step 2: Convert to fraction form
   12,945.24/17,870.45 = 9,759.83/x
3. Step 3: Cross multiply
   12,945.24x = 17,870.45 × 9,759.83
4. Step 4: Simplify right side
   12,945.24x = 174,412,509.35
5. Step 5: Solve for x
   x = 174,412,509.35/12,945.24
6. Step 6: Final answer
   x = 13,473.10