Finding the Fourth Proportional to 2,144.72, 2,959.85 and 1,200.59

Step by Step Solution

1. Step 1: Write the proportion equation
   2,144.72 : 2,959.85 = 1,200.59 : x
2. Step 2: Convert to fraction form
   2,144.72/2,959.85 = 1,200.59/x
3. Step 3: Cross multiply
   2,144.72x = 2,959.85 × 1,200.59
4. Step 4: Simplify right side
   2,144.72x = 3,553,566.31
5. Step 5: Solve for x
   x = 3,553,566.31/2,144.72
6. Step 6: Final answer
   x = 1,656.89