Finding the Fourth Proportional to 1,096.79, 1,645.18 and 548.42

Step by Step Solution

1. Step 1: Write the proportion equation
   1,096.79 : 1,645.18 = 548.42 : x
2. Step 2: Convert to fraction form
   1,096.79/1,645.18 = 548.42/x
3. Step 3: Cross multiply
   1,096.79x = 1,645.18 × 548.42
4. Step 4: Simplify right side
   1,096.79x = 902,240.02
5. Step 5: Solve for x
   x = 902,240.02/1,096.79
6. Step 6: Final answer
   x = 822.62