Finding the Fourth Proportional to 3,906.77, 5,860.18 and 985.10

Step by Step Solution

1. Step 1: Write the proportion equation
   3,906.77 : 5,860.18 = 985.10 : x
2. Step 2: Convert to fraction form
   3,906.77/5,860.18 = 985.10/x
3. Step 3: Cross multiply
   3,906.77x = 5,860.18 × 985.10
4. Step 4: Simplify right side
   3,906.77x = 5,772,835.25
5. Step 5: Solve for x
   x = 5,772,835.25/3,906.77
6. Step 6: Final answer
   x = 1,477.65