Finding the Fourth Proportional to 6,831.12, 10,200.88 and 5,429

Step by Step Solution

1. Step 1: Write the proportion equation
   6,831.12 : 10,200.88 = 5,429 : x
2. Step 2: Convert to fraction form
   6,831.12/10,200.88 = 5,429/x
3. Step 3: Cross multiply
   6,831.12x = 10,200.88 × 5,429
4. Step 4: Simplify right side
   6,831.12x = 55,380,577.52
5. Step 5: Solve for x
   x = 55,380,577.52/6,831.12
6. Step 6: Final answer
   x = 8,107.10