Finding the Fourth Proportional to 3,902.79, 5,825.60 and 3,386.37

Step by Step Solution

1. Step 1: Write the proportion equation
   3,902.79 : 5,825.60 = 3,386.37 : x
2. Step 2: Convert to fraction form
   3,902.79/5,825.60 = 3,386.37/x
3. Step 3: Cross multiply
   3,902.79x = 5,825.60 × 3,386.37
4. Step 4: Simplify right side
   3,902.79x = 19,727,645.54
5. Step 5: Solve for x
   x = 19,727,645.54/3,902.79
6. Step 6: Final answer
   x = 5,054.75