Finding the Fourth Proportional to 10,518.26, 15,772.78 and 3,939.83

Step by Step Solution

1. Step 1: Write the proportion equation
   10,518.26 : 15,772.78 = 3,939.83 : x
2. Step 2: Convert to fraction form
   10,518.26/15,772.78 = 3,939.83/x
3. Step 3: Cross multiply
   10,518.26x = 15,772.78 × 3,939.83
4. Step 4: Simplify right side
   10,518.26x = 62,142,101.41
5. Step 5: Solve for x
   x = 62,142,101.41/10,518.26
6. Step 6: Final answer
   x = 5,908.02