Finding the Fourth Proportional to 12,839.13, 17,716.25 and 7,173.18

Step by Step Solution

1. Step 1: Write the proportion equation
   12,839.13 : 17,716.25 = 7,173.18 : x
2. Step 2: Convert to fraction form
   12,839.13/17,716.25 = 7,173.18/x
3. Step 3: Cross multiply
   12,839.13x = 17,716.25 × 7,173.18
4. Step 4: Simplify right side
   12,839.13x = 127,081,814.31
5. Step 5: Solve for x
   x = 127,081,814.31/12,839.13
6. Step 6: Final answer
   x = 9,898.01