Finding the Fourth Proportional to 3,712.72, 5,123.46 and 2,140.96

Step by Step Solution

1. Step 1: Write the proportion equation
   3,712.72 : 5,123.46 = 2,140.96 : x
2. Step 2: Convert to fraction form
   3,712.72/5,123.46 = 2,140.96/x
3. Step 3: Cross multiply
   3,712.72x = 5,123.46 × 2,140.96
4. Step 4: Simplify right side
   3,712.72x = 10,969,122.92
5. Step 5: Solve for x
   x = 10,969,122.92/3,712.72
6. Step 6: Final answer
   x = 2,954.47