Finding the Fourth Proportional to 12,694.29, 17,517.85 and 7,028.72

Step by Step Solution

1. Step 1: Write the proportion equation
   12,694.29 : 17,517.85 = 7,028.72 : x
2. Step 2: Convert to fraction form
   12,694.29/17,517.85 = 7,028.72/x
3. Step 3: Cross multiply
   12,694.29x = 17,517.85 × 7,028.72
4. Step 4: Simplify right side
   12,694.29x = 123,127,975.06
5. Step 5: Solve for x
   x = 123,127,975.06/12,694.29
6. Step 6: Final answer
   x = 9,699.48