Finding the Fourth Proportional to 3,929.29, 5,419.59 and 2,668.15

Step by Step Solution

1. Step 1: Write the proportion equation
   3,929.29 : 5,419.59 = 2,668.15 : x
2. Step 2: Convert to fraction form
   3,929.29/5,419.59 = 2,668.15/x
3. Step 3: Cross multiply
   3,929.29x = 5,419.59 × 2,668.15
4. Step 4: Simplify right side
   3,929.29x = 14,460,265.72
5. Step 5: Solve for x
   x = 14,460,265.72/3,929.29
6. Step 6: Final answer
   x = 3,680.13