Finding the Fourth Proportional to 2,789.48, 4,184.24 and 1,288.36

Step by Step Solution

1. Step 1: Write the proportion equation
   2,789.48 : 4,184.24 = 1,288.36 : x
2. Step 2: Convert to fraction form
   2,789.48/4,184.24 = 1,288.36/x
3. Step 3: Cross multiply
   2,789.48x = 4,184.24 × 1,288.36
4. Step 4: Simplify right side
   2,789.48x = 5,390,807.45
5. Step 5: Solve for x
   x = 5,390,807.45/2,789.48
6. Step 6: Final answer
   x = 1,932.55