Finding the Fourth Proportional to 2,732.71, 4,091.78 and 1,431.45

Step by Step Solution

1. Step 1: Write the proportion equation
   2,732.71 : 4,091.78 = 1,431.45 : x
2. Step 2: Convert to fraction form
   2,732.71/4,091.78 = 1,431.45/x
3. Step 3: Cross multiply
   2,732.71x = 4,091.78 × 1,431.45
4. Step 4: Simplify right side
   2,732.71x = 5,857,178.48
5. Step 5: Solve for x
   x = 5,857,178.48/2,732.71
6. Step 6: Final answer
   x = 2,143.36