Finding the Fourth Proportional to 3,929.10, 5,420.34 and 2,354.46

Step by Step Solution

1. Step 1: Write the proportion equation
   3,929.10 : 5,420.34 = 2,354.46 : x
2. Step 2: Convert to fraction form
   3,929.10/5,420.34 = 2,354.46/x
3. Step 3: Cross multiply
   3,929.10x = 5,420.34 × 2,354.46
4. Step 4: Simplify right side
   3,929.10x = 12,761,973.72
5. Step 5: Solve for x
   x = 12,761,973.72/3,929.10
6. Step 6: Final answer
   x = 3,248.07