Finding the Fourth Proportional to 1,097.01, 1,647.96 and 664.47

Step by Step Solution

1. Step 1: Write the proportion equation
   1,097.01 : 1,647.96 = 664.47 : x
2. Step 2: Convert to fraction form
   1,097.01/1,647.96 = 664.47/x
3. Step 3: Cross multiply
   1,097.01x = 1,647.96 × 664.47
4. Step 4: Simplify right side
   1,097.01x = 1,095,019.98
5. Step 5: Solve for x
   x = 1,095,019.98/1,097.01
6. Step 6: Final answer
   x = 998.19