Finding the Fourth Proportional to 3,906.38, 5,860.47 and 1,309.25

Step by Step Solution

1. Step 1: Write the proportion equation
   3,906.38 : 5,860.47 = 1,309.25 : x
2. Step 2: Convert to fraction form
   3,906.38/5,860.47 = 1,309.25/x
3. Step 3: Cross multiply
   3,906.38x = 5,860.47 × 1,309.25
4. Step 4: Simplify right side
   3,906.38x = 7,672,820.35
5. Step 5: Solve for x
   x = 7,672,820.35/3,906.38
6. Step 6: Final answer
   x = 1,964.18