Finding the Fourth Proportional to 12,321.50, 18,469.49 and 5,742.27

Step by Step Solution

1. Step 1: Write the proportion equation
   12,321.50 : 18,469.49 = 5,742.27 : x
2. Step 2: Convert to fraction form
   12,321.50/18,469.49 = 5,742.27/x
3. Step 3: Cross multiply
   12,321.50x = 18,469.49 × 5,742.27
4. Step 4: Simplify right side
   12,321.50x = 106,056,769.63
5. Step 5: Solve for x
   x = 106,056,769.63/12,321.50
6. Step 6: Final answer
   x = 8,607.46