Finding the Fourth Proportional to 3,905.67, 5,857.83 and 1,308.60

Step by Step Solution

1. Step 1: Write the proportion equation
   3,905.67 : 5,857.83 = 1,308.60 : x
2. Step 2: Convert to fraction form
   3,905.67/5,857.83 = 1,308.60/x
3. Step 3: Cross multiply
   3,905.67x = 5,857.83 × 1,308.60
4. Step 4: Simplify right side
   3,905.67x = 7,665,556.34
5. Step 5: Solve for x
   x = 7,665,556.34/3,905.67
6. Step 6: Final answer
   x = 1,962.67