Finding the Fourth Proportional to 3,920.41, 5,412.70 and 2,429.91

Step by Step Solution

1. Step 1: Write the proportion equation
   3,920.41 : 5,412.70 = 2,429.91 : x
2. Step 2: Convert to fraction form
   3,920.41/5,412.70 = 2,429.91/x
3. Step 3: Cross multiply
   3,920.41x = 5,412.70 × 2,429.91
4. Step 4: Simplify right side
   3,920.41x = 13,152,367.78
5. Step 5: Solve for x
   x = 13,152,367.78/3,920.41
6. Step 6: Final answer
   x = 3,354.85