Finding the Fourth Proportional to 2,761.47, 4,139.87 and 1,200.28

Step by Step Solution

1. Step 1: Write the proportion equation
   2,761.47 : 4,139.87 = 1,200.28 : x
2. Step 2: Convert to fraction form
   2,761.47/4,139.87 = 1,200.28/x
3. Step 3: Cross multiply
   2,761.47x = 4,139.87 × 1,200.28
4. Step 4: Simplify right side
   2,761.47x = 4,969,003.16
5. Step 5: Solve for x
   x = 4,969,003.16/2,761.47
6. Step 6: Final answer
   x = 1,799.41