Finding the Fourth Proportional to 1,096.72, 1,643.86 and 549.36

Step by Step Solution

1. Step 1: Write the proportion equation
   1,096.72 : 1,643.86 = 549.36 : x
2. Step 2: Convert to fraction form
   1,096.72/1,643.86 = 549.36/x
3. Step 3: Cross multiply
   1,096.72x = 1,643.86 × 549.36
4. Step 4: Simplify right side
   1,096.72x = 903,070.93
5. Step 5: Solve for x
   x = 903,070.93/1,096.72
6. Step 6: Final answer
   x = 823.43