Finding the Fourth Proportional to 8,123.63, 11,212.37 and 5,143.43

Step by Step Solution

1. Step 1: Write the proportion equation
   8,123.63 : 11,212.37 = 5,143.43 : x
2. Step 2: Convert to fraction form
   8,123.63/11,212.37 = 5,143.43/x
3. Step 3: Cross multiply
   8,123.63x = 11,212.37 × 5,143.43
4. Step 4: Simplify right side
   8,123.63x = 57,669,958.45
5. Step 5: Solve for x
   x = 57,669,958.45/8,123.63
6. Step 6: Final answer
   x = 7,099.04