Finding the Fourth Proportional to 3,724.89, 5,140.98 and 2,153.94

Step by Step Solution

1. Step 1: Write the proportion equation
   3,724.89 : 5,140.98 = 2,153.94 : x
2. Step 2: Convert to fraction form
   3,724.89/5,140.98 = 2,153.94/x
3. Step 3: Cross multiply
   3,724.89x = 5,140.98 × 2,153.94
4. Step 4: Simplify right side
   3,724.89x = 11,073,362.46
5. Step 5: Solve for x
   x = 11,073,362.46/3,724.89
6. Step 6: Final answer
   x = 2,972.80