Finding the Fourth Proportional to 2,142.59, 2,958.45 and 1,644.44

Step by Step Solution

1. Step 1: Write the proportion equation
   2,142.59 : 2,958.45 = 1,644.44 : x
2. Step 2: Convert to fraction form
   2,142.59/2,958.45 = 1,644.44/x
3. Step 3: Cross multiply
   2,142.59x = 2,958.45 × 1,644.44
4. Step 4: Simplify right side
   2,142.59x = 4,864,970.50
5. Step 5: Solve for x
   x = 4,864,970.50/2,142.59
6. Step 6: Final answer
   x = 2,270.61