Finding the Fourth Proportional to 2,144.79, 2,959.14 and 1,200.45

Step by Step Solution

1. Step 1: Write the proportion equation
   2,144.79 : 2,959.14 = 1,200.45 : x
2. Step 2: Convert to fraction form
   2,144.79/2,959.14 = 1,200.45/x
3. Step 3: Cross multiply
   2,144.79x = 2,959.14 × 1,200.45
4. Step 4: Simplify right side
   2,144.79x = 3,552,299.61
5. Step 5: Solve for x
   x = 3,552,299.61/2,144.79
6. Step 6: Final answer
   x = 1,656.25