Finding the Fourth Proportional to 11,825.73, 17,707.28 and 7,139.48

Step by Step Solution

1. Step 1: Write the proportion equation
   11,825.73 : 17,707.28 = 7,139.48 : x
2. Step 2: Convert to fraction form
   11,825.73/17,707.28 = 7,139.48/x
3. Step 3: Cross multiply
   11,825.73x = 17,707.28 × 7,139.48
4. Step 4: Simplify right side
   11,825.73x = 126,420,647.18
5. Step 5: Solve for x
   x = 126,420,647.18/11,825.73
6. Step 6: Final answer
   x = 10,690.30