Finding the Fourth Proportional to 3,831.39, 5,287.35 and 2,152.76

Step by Step Solution

1. Step 1: Write the proportion equation
   3,831.39 : 5,287.35 = 2,152.76 : x
2. Step 2: Convert to fraction form
   3,831.39/5,287.35 = 2,152.76/x
3. Step 3: Cross multiply
   3,831.39x = 5,287.35 × 2,152.76
4. Step 4: Simplify right side
   3,831.39x = 11,382,377.22
5. Step 5: Solve for x
   x = 11,382,377.22/3,831.39
6. Step 6: Final answer
   x = 2,970.82