Finding the Fourth Proportional to 11,513.48, 17,241.06 and 7,139.48

Step by Step Solution

1. Step 1: Write the proportion equation
   11,513.48 : 17,241.06 = 7,139.48 : x
2. Step 2: Convert to fraction form
   11,513.48/17,241.06 = 7,139.48/x
3. Step 3: Cross multiply
   11,513.48x = 17,241.06 × 7,139.48
4. Step 4: Simplify right side
   11,513.48x = 123,092,203.05
5. Step 5: Solve for x
   x = 123,092,203.05/11,513.48
6. Step 6: Final answer
   x = 10,691.14