Finding the Fourth Proportional to 6,396.18, 8,831.10 and 4,007.10

Step by Step Solution

1. Step 1: Write the proportion equation
   6,396.18 : 8,831.10 = 4,007.10 : x
2. Step 2: Convert to fraction form
   6,396.18/8,831.10 = 4,007.10/x
3. Step 3: Cross multiply
   6,396.18x = 8,831.10 × 4,007.10
4. Step 4: Simplify right side
   6,396.18x = 35,387,100.81
5. Step 5: Solve for x
   x = 35,387,100.81/6,396.18
6. Step 6: Final answer
   x = 5,532.54