Finding the Fourth Proportional to 5,485.72, 8,223.72 and 4,192.96

Step by Step Solution

1. Step 1: Write the proportion equation
   5,485.72 : 8,223.72 = 4,192.96 : x
2. Step 2: Convert to fraction form
   5,485.72/8,223.72 = 4,192.96/x
3. Step 3: Cross multiply
   5,485.72x = 8,223.72 × 4,192.96
4. Step 4: Simplify right side
   5,485.72x = 34,481,729.01
5. Step 5: Solve for x
   x = 34,481,729.01/5,485.72
6. Step 6: Final answer
   x = 6,285.73