Finding the Fourth Proportional to 12,997.23, 17,936.17 and 7,028.91

Step by Step Solution

1. Step 1: Write the proportion equation
   12,997.23 : 17,936.17 = 7,028.91 : x
2. Step 2: Convert to fraction form
   12,997.23/17,936.17 = 7,028.91/x
3. Step 3: Cross multiply
   12,997.23x = 17,936.17 × 7,028.91
4. Step 4: Simplify right side
   12,997.23x = 126,071,707.10
5. Step 5: Solve for x
   x = 126,071,707.10/12,997.23
6. Step 6: Final answer
   x = 9,699.89