Finding the Fourth Proportional to 3,443.38, 5,168.71 and 2,145.76

Step by Step Solution

1. Step 1: Write the proportion equation
   3,443.38 : 5,168.71 = 2,145.76 : x
2. Step 2: Convert to fraction form
   3,443.38/5,168.71 = 2,145.76/x
3. Step 3: Cross multiply
   3,443.38x = 5,168.71 × 2,145.76
4. Step 4: Simplify right side
   3,443.38x = 11,090,811.17
5. Step 5: Solve for x
   x = 11,090,811.17/3,443.38
6. Step 6: Final answer
   x = 3,220.91