Finding the Fourth Proportional to 21,231.94, 31,847.81 and 5,436.94

Step by Step Solution

1. Step 1: Write the proportion equation
   21,231.94 : 31,847.81 = 5,436.94 : x
2. Step 2: Convert to fraction form
   21,231.94/31,847.81 = 5,436.94/x
3. Step 3: Cross multiply
   21,231.94x = 31,847.81 × 5,436.94
4. Step 4: Simplify right side
   21,231.94x = 173,154,632.10
5. Step 5: Solve for x
   x = 173,154,632.10/21,231.94
6. Step 6: Final answer
   x = 8,155.38