Finding the Fourth Proportional to 2,760.40, 4,138.21 and 1,300.58

Step by Step Solution

1. Step 1: Write the proportion equation
   2,760.40 : 4,138.21 = 1,300.58 : x
2. Step 2: Convert to fraction form
   2,760.40/4,138.21 = 1,300.58/x
3. Step 3: Cross multiply
   2,760.40x = 4,138.21 × 1,300.58
4. Step 4: Simplify right side
   2,760.40x = 5,382,084.91
5. Step 5: Solve for x
   x = 5,382,084.91/2,760.40
6. Step 6: Final answer
   x = 1,949.75