Finding the Fourth Proportional to 2,145.49, 2,960.39 and 1,261.47

Step by Step Solution

1. Step 1: Write the proportion equation
   2,145.49 : 2,960.39 = 1,261.47 : x
2. Step 2: Convert to fraction form
   2,145.49/2,960.39 = 1,261.47/x
3. Step 3: Cross multiply
   2,145.49x = 2,960.39 × 1,261.47
4. Step 4: Simplify right side
   2,145.49x = 3,734,422.06
5. Step 5: Solve for x
   x = 3,734,422.06/2,145.49
6. Step 6: Final answer
   x = 1,740.60