Finding the Fourth Proportional to 5,429.78, 8,132.01 and 3,965.30

Step by Step Solution

1. Step 1: Write the proportion equation
   5,429.78 : 8,132.01 = 3,965.30 : x
2. Step 2: Convert to fraction form
   5,429.78/8,132.01 = 3,965.30/x
3. Step 3: Cross multiply
   5,429.78x = 8,132.01 × 3,965.30
4. Step 4: Simplify right side
   5,429.78x = 32,245,859.25
5. Step 5: Solve for x
   x = 32,245,859.25/5,429.78
6. Step 6: Final answer
   x = 5,938.70