Finding the Fourth Proportional to 2,013.53, 2,766.89 and 1,639.71

Step by Step Solution

1. Step 1: Write the proportion equation
   2,013.53 : 2,766.89 = 1,639.71 : x
2. Step 2: Convert to fraction form
   2,013.53/2,766.89 = 1,639.71/x
3. Step 3: Cross multiply
   2,013.53x = 2,766.89 × 1,639.71
4. Step 4: Simplify right side
   2,013.53x = 4,536,901.30
5. Step 5: Solve for x
   x = 4,536,901.30/2,013.53
6. Step 6: Final answer
   x = 2,253.21