Finding the Fourth Proportional to 2,760.15, 4,138.19 and 1,298.50

Step by Step Solution

1. Step 1: Write the proportion equation
   2,760.15 : 4,138.19 = 1,298.50 : x
2. Step 2: Convert to fraction form
   2,760.15/4,138.19 = 1,298.50/x
3. Step 3: Cross multiply
   2,760.15x = 4,138.19 × 1,298.50
4. Step 4: Simplify right side
   2,760.15x = 5,373,442.96
5. Step 5: Solve for x
   x = 5,373,442.96/2,760.15
6. Step 6: Final answer
   x = 1,946.80