Finding the Fourth Proportional to 11,761.48, 17,638.57 and 3,968.47

Step by Step Solution

1. Step 1: Write the proportion equation
   11,761.48 : 17,638.57 = 3,968.47 : x
2. Step 2: Convert to fraction form
   11,761.48/17,638.57 = 3,968.47/x
3. Step 3: Cross multiply
   11,761.48x = 17,638.57 × 3,968.47
4. Step 4: Simplify right side
   11,761.48x = 69,998,135.89
5. Step 5: Solve for x
   x = 69,998,135.89/11,761.48
6. Step 6: Final answer
   x = 5,951.47