Finding the Fourth Proportional to 3,906.82, 5,859.87 and 985.15

Step by Step Solution

1. Step 1: Write the proportion equation
   3,906.82 : 5,859.87 = 985.15 : x
2. Step 2: Convert to fraction form
   3,906.82/5,859.87 = 985.15/x
3. Step 3: Cross multiply
   3,906.82x = 5,859.87 × 985.15
4. Step 4: Simplify right side
   3,906.82x = 5,772,850.93
5. Step 5: Solve for x
   x = 5,772,850.93/3,906.82
6. Step 6: Final answer
   x = 1,477.63