Finding the Fourth Proportional to 10,518.14, 15,772.59 and 3,939.71

Step by Step Solution

1. Step 1: Write the proportion equation
   10,518.14 : 15,772.59 = 3,939.71 : x
2. Step 2: Convert to fraction form
   10,518.14/15,772.59 = 3,939.71/x
3. Step 3: Cross multiply
   10,518.14x = 15,772.59 × 3,939.71
4. Step 4: Simplify right side
   10,518.14x = 62,139,391.12
5. Step 5: Solve for x
   x = 62,139,391.12/10,518.14
6. Step 6: Final answer
   x = 5,907.83