Finding the Fourth Proportional to 8,643.69, 11,928.20 and 5,106.83

Step by Step Solution

1. Step 1: Write the proportion equation
   8,643.69 : 11,928.20 = 5,106.83 : x
2. Step 2: Convert to fraction form
   8,643.69/11,928.20 = 5,106.83/x
3. Step 3: Cross multiply
   8,643.69x = 11,928.20 × 5,106.83
4. Step 4: Simplify right side
   8,643.69x = 60,915,204.43
5. Step 5: Solve for x
   x = 60,915,204.43/8,643.69
6. Step 6: Final answer
   x = 7,047.36