Finding the Fourth Proportional to 20,850.72, 31,277.16 and 5,268.48

Step by Step Solution

1. Step 1: Write the proportion equation
   20,850.72 : 31,277.16 = 5,268.48 : x
2. Step 2: Convert to fraction form
   20,850.72/31,277.16 = 5,268.48/x
3. Step 3: Cross multiply
   20,850.72x = 31,277.16 × 5,268.48
4. Step 4: Simplify right side
   20,850.72x = 164,783,091.92
5. Step 5: Solve for x
   x = 164,783,091.92/20,850.72
6. Step 6: Final answer
   x = 7,902.99