Finding the Fourth Proportional to 5,724.82, 7,895.12 and 3,931.48

Step by Step Solution

1. Step 1: Write the proportion equation
   5,724.82 : 7,895.12 = 3,931.48 : x
2. Step 2: Convert to fraction form
   5,724.82/7,895.12 = 3,931.48/x
3. Step 3: Cross multiply
   5,724.82x = 7,895.12 × 3,931.48
4. Step 4: Simplify right side
   5,724.82x = 31,039,506.38
5. Step 5: Solve for x
   x = 31,039,506.38/5,724.82
6. Step 6: Final answer
   x = 5,421.92