Finding the Fourth Proportional to 2,831.46, 4,248.86 and 1,187.88

Step by Step Solution

1. Step 1: Write the proportion equation
   2,831.46 : 4,248.86 = 1,187.88 : x
2. Step 2: Convert to fraction form
   2,831.46/4,248.86 = 1,187.88/x
3. Step 3: Cross multiply
   2,831.46x = 4,248.86 × 1,187.88
4. Step 4: Simplify right side
   2,831.46x = 5,047,129.88
5. Step 5: Solve for x
   x = 5,047,129.88/2,831.46
6. Step 6: Final answer
   x = 1,782.52