Finding the Fourth Proportional to 3,906.55, 5,860.68 and 1,309.42

Step by Step Solution

1. Step 1: Write the proportion equation
   3,906.55 : 5,860.68 = 1,309.42 : x
2. Step 2: Convert to fraction form
   3,906.55/5,860.68 = 1,309.42/x
3. Step 3: Cross multiply
   3,906.55x = 5,860.68 × 1,309.42
4. Step 4: Simplify right side
   3,906.55x = 7,674,091.61
5. Step 5: Solve for x
   x = 7,674,091.61/3,906.55
6. Step 6: Final answer
   x = 1,964.42