Finding the Fourth Proportional to 1,092.18, 1,636.56 and 543.54

Step by Step Solution

1. Step 1: Write the proportion equation
   1,092.18 : 1,636.56 = 543.54 : x
2. Step 2: Convert to fraction form
   1,092.18/1,636.56 = 543.54/x
3. Step 3: Cross multiply
   1,092.18x = 1,636.56 × 543.54
4. Step 4: Simplify right side
   1,092.18x = 889,535.82
5. Step 5: Solve for x
   x = 889,535.82/1,092.18
6. Step 6: Final answer
   x = 814.46