Finding the Fourth Proportional to 2,144.73, 2,959.63 and 1,200.45

Step by Step Solution

1. Step 1: Write the proportion equation
   2,144.73 : 2,959.63 = 1,200.45 : x
2. Step 2: Convert to fraction form
   2,144.73/2,959.63 = 1,200.45/x
3. Step 3: Cross multiply
   2,144.73x = 2,959.63 × 1,200.45
4. Step 4: Simplify right side
   2,144.73x = 3,552,887.83
5. Step 5: Solve for x
   x = 3,552,887.83/2,144.73
6. Step 6: Final answer
   x = 1,656.57