Finding the Fourth Proportional to 5,169.38, 7,133.83 and 2,931.21

Step by Step Solution

1. Step 1: Write the proportion equation
   5,169.38 : 7,133.83 = 2,931.21 : x
2. Step 2: Convert to fraction form
   5,169.38/7,133.83 = 2,931.21/x
3. Step 3: Cross multiply
   5,169.38x = 7,133.83 × 2,931.21
4. Step 4: Simplify right side
   5,169.38x = 20,910,753.83
5. Step 5: Solve for x
   x = 20,910,753.83/5,169.38
6. Step 6: Final answer
   x = 4,045.12