Finding the Fourth Proportional to 2,144.87, 2,959.63 and 1,200.61

Step by Step Solution

1. Step 1: Write the proportion equation
   2,144.87 : 2,959.63 = 1,200.61 : x
2. Step 2: Convert to fraction form
   2,144.87/2,959.63 = 1,200.61/x
3. Step 3: Cross multiply
   2,144.87x = 2,959.63 × 1,200.61
4. Step 4: Simplify right side
   2,144.87x = 3,553,361.37
5. Step 5: Solve for x
   x = 3,553,361.37/2,144.87
6. Step 6: Final answer
   x = 1,656.68