Finding the Fourth Proportional to 3,929.60, 5,922.67 and 3,388.32

Step by Step Solution

1. Step 1: Write the proportion equation
   3,929.60 : 5,922.67 = 3,388.32 : x
2. Step 2: Convert to fraction form
   3,929.60/5,922.67 = 3,388.32/x
3. Step 3: Cross multiply
   3,929.60x = 5,922.67 × 3,388.32
4. Step 4: Simplify right side
   3,929.60x = 20,067,901.21
5. Step 5: Solve for x
   x = 20,067,901.21/3,929.60
6. Step 6: Final answer
   x = 5,106.86