Finding the Fourth Proportional to 3,929.50, 5,419.47 and 2,354.86

Step by Step Solution

1. Step 1: Write the proportion equation
   3,929.50 : 5,419.47 = 2,354.86 : x
2. Step 2: Convert to fraction form
   3,929.50/5,419.47 = 2,354.86/x
3. Step 3: Cross multiply
   3,929.50x = 5,419.47 × 2,354.86
4. Step 4: Simplify right side
   3,929.50x = 12,762,093.12
5. Step 5: Solve for x
   x = 12,762,093.12/3,929.50
6. Step 6: Final answer
   x = 3,247.77