Finding the Fourth Proportional to 1,775.69, 2,662.72 and 664.29

Step by Step Solution

1. Step 1: Write the proportion equation
   1,775.69 : 2,662.72 = 664.29 : x
2. Step 2: Convert to fraction form
   1,775.69/2,662.72 = 664.29/x
3. Step 3: Cross multiply
   1,775.69x = 2,662.72 × 664.29
4. Step 4: Simplify right side
   1,775.69x = 1,768,818.27
5. Step 5: Solve for x
   x = 1,768,818.27/1,775.69
6. Step 6: Final answer
   x = 996.13