Finding the Fourth Proportional to 2,831.89, 4,247.99 and 1,188.50

Step by Step Solution

1. Step 1: Write the proportion equation
   2,831.89 : 4,247.99 = 1,188.50 : x
2. Step 2: Convert to fraction form
   2,831.89/4,247.99 = 1,188.50/x
3. Step 3: Cross multiply
   2,831.89x = 4,247.99 × 1,188.50
4. Step 4: Simplify right side
   2,831.89x = 5,048,736.12
5. Step 5: Solve for x
   x = 5,048,736.12/2,831.89
6. Step 6: Final answer
   x = 1,782.82