Finding the Fourth Proportional to 3,929.08, 5,422.39 and 2,335.31

Step by Step Solution

1. Step 1: Write the proportion equation
   3,929.08 : 5,422.39 = 2,335.31 : x
2. Step 2: Convert to fraction form
   3,929.08/5,422.39 = 2,335.31/x
3. Step 3: Cross multiply
   3,929.08x = 5,422.39 × 2,335.31
4. Step 4: Simplify right side
   3,929.08x = 12,662,946.86
5. Step 5: Solve for x
   x = 12,662,946.86/3,929.08
6. Step 6: Final answer
   x = 3,222.88