Finding the Fourth Proportional to 12,693.27, 17,517.03 and 7,028.40

Step by Step Solution

1. Step 1: Write the proportion equation
   12,693.27 : 17,517.03 = 7,028.40 : x
2. Step 2: Convert to fraction form
   12,693.27/17,517.03 = 7,028.40/x
3. Step 3: Cross multiply
   12,693.27x = 17,517.03 × 7,028.40
4. Step 4: Simplify right side
   12,693.27x = 123,116,693.65
5. Step 5: Solve for x
   x = 123,116,693.65/12,693.27
6. Step 6: Final answer
   x = 9,699.37