Finding the Fourth Proportional to 12,835.72, 17,713.79 and 7,170.18

Step by Step Solution

1. Step 1: Write the proportion equation
   12,835.72 : 17,713.79 = 7,170.18 : x
2. Step 2: Convert to fraction form
   12,835.72/17,713.79 = 7,170.18/x
3. Step 3: Cross multiply
   12,835.72x = 17,713.79 × 7,170.18
4. Step 4: Simplify right side
   12,835.72x = 127,011,062.78
5. Step 5: Solve for x
   x = 127,011,062.78/12,835.72
6. Step 6: Final answer
   x = 9,895.13