Finding the Fourth Proportional to 3,902.78, 5,862.33 and 3,317.69

Step by Step Solution

1. Step 1: Write the proportion equation
   3,902.78 : 5,862.33 = 3,317.69 : x
2. Step 2: Convert to fraction form
   3,902.78/5,862.33 = 3,317.69/x
3. Step 3: Cross multiply
   3,902.78x = 5,862.33 × 3,317.69
4. Step 4: Simplify right side
   3,902.78x = 19,449,364.31
5. Step 5: Solve for x
   x = 19,449,364.31/3,902.78
6. Step 6: Final answer
   x = 4,983.47