Finding the Fourth Proportional to 1,096.72, 1,644.22 and 548.62

Step by Step Solution

1. Step 1: Write the proportion equation
   1,096.72 : 1,644.22 = 548.62 : x
2. Step 2: Convert to fraction form
   1,096.72/1,644.22 = 548.62/x
3. Step 3: Cross multiply
   1,096.72x = 1,644.22 × 548.62
4. Step 4: Simplify right side
   1,096.72x = 902,051.98
5. Step 5: Solve for x
   x = 902,051.98/1,096.72
6. Step 6: Final answer
   x = 822.50