Finding the Fourth Proportional to 3,929.66, 5,863.86 and 3,580.35

Step by Step Solution

1. Step 1: Write the proportion equation
   3,929.66 : 5,863.86 = 3,580.35 : x
2. Step 2: Convert to fraction form
   3,929.66/5,863.86 = 3,580.35/x
3. Step 3: Cross multiply
   3,929.66x = 5,863.86 × 3,580.35
4. Step 4: Simplify right side
   3,929.66x = 20,994,680.10
5. Step 5: Solve for x
   x = 20,994,680.10/3,929.66
6. Step 6: Final answer
   x = 5,342.62