Finding the Fourth Proportional to 5,730.42, 7,909.38 and 3,847.31

Step by Step Solution

1. Step 1: Write the proportion equation
   5,730.42 : 7,909.38 = 3,847.31 : x
2. Step 2: Convert to fraction form
   5,730.42/7,909.38 = 3,847.31/x
3. Step 3: Cross multiply
   5,730.42x = 7,909.38 × 3,847.31
4. Step 4: Simplify right side
   5,730.42x = 30,429,797.22
5. Step 5: Solve for x
   x = 30,429,797.22/5,730.42
6. Step 6: Final answer
   x = 5,310.22