Finding the Fourth Proportional to 3,191.86, 4,789.28 and 1,243.54

Step by Step Solution

1. Step 1: Write the proportion equation
   3,191.86 : 4,789.28 = 1,243.54 : x
2. Step 2: Convert to fraction form
   3,191.86/4,789.28 = 1,243.54/x
3. Step 3: Cross multiply
   3,191.86x = 4,789.28 × 1,243.54
4. Step 4: Simplify right side
   3,191.86x = 5,955,661.25
5. Step 5: Solve for x
   x = 5,955,661.25/3,191.86
6. Step 6: Final answer
   x = 1,865.89