Finding the Fourth Proportional to 2,849.31, 4,270.50 and 1,288.92

Step by Step Solution

1. Step 1: Write the proportion equation
   2,849.31 : 4,270.50 = 1,288.92 : x
2. Step 2: Convert to fraction form
   2,849.31/4,270.50 = 1,288.92/x
3. Step 3: Cross multiply
   2,849.31x = 4,270.50 × 1,288.92
4. Step 4: Simplify right side
   2,849.31x = 5,504,332.86
5. Step 5: Solve for x
   x = 5,504,332.86/2,849.31
6. Step 6: Final answer
   x = 1,931.81