Finding the Fourth Proportional to 8,436, 12,644.43 and 5,141.83

Step by Step Solution

1. Step 1: Write the proportion equation
   8,436 : 12,644.43 = 5,141.83 : x
2. Step 2: Convert to fraction form
   8,436/12,644.43 = 5,141.83/x
3. Step 3: Cross multiply
   8,436x = 12,644.43 × 5,141.83
4. Step 4: Simplify right side
   8,436x = 65,015,509.51
5. Step 5: Solve for x
   x = 65,015,509.51/8,436
6. Step 6: Final answer
   x = 7,706.91