Finding the Fourth Proportional to 5,895.72, 8,136.32 and 3,906.90

Step by Step Solution

1. Step 1: Write the proportion equation
   5,895.72 : 8,136.32 = 3,906.90 : x
2. Step 2: Convert to fraction form
   5,895.72/8,136.32 = 3,906.90/x
3. Step 3: Cross multiply
   5,895.72x = 8,136.32 × 3,906.90
4. Step 4: Simplify right side
   5,895.72x = 31,787,769.07
5. Step 5: Solve for x
   x = 31,787,769.07/5,895.72
6. Step 6: Final answer
   x = 5,391.67