Finding the Fourth Proportional to 12,836.43, 17,713.01 and 7,170.72

Step by Step Solution

1. Step 1: Write the proportion equation
   12,836.43 : 17,713.01 = 7,170.72 : x
2. Step 2: Convert to fraction form
   12,836.43/17,713.01 = 7,170.72/x
3. Step 3: Cross multiply
   12,836.43x = 17,713.01 × 7,170.72
4. Step 4: Simplify right side
   12,836.43x = 127,014,999.21
5. Step 5: Solve for x
   x = 127,014,999.21/12,836.43
6. Step 6: Final answer
   x = 9,894.89