Finding the Fourth Proportional to 10,968.78, 16,456.13 and 3,949.59

Step by Step Solution

1. Step 1: Write the proportion equation
   10,968.78 : 16,456.13 = 3,949.59 : x
2. Step 2: Convert to fraction form
   10,968.78/16,456.13 = 3,949.59/x
3. Step 3: Cross multiply
   10,968.78x = 16,456.13 × 3,949.59
4. Step 4: Simplify right side
   10,968.78x = 64,995,023.26
5. Step 5: Solve for x
   x = 64,995,023.26/10,968.78
6. Step 6: Final answer
   x = 5,925.45