Finding the Fourth Proportional to 1,185.25, 1,635.54 and 661.27

Step by Step Solution

1. Step 1: Write the proportion equation
   1,185.25 : 1,635.54 = 661.27 : x
2. Step 2: Convert to fraction form
   1,185.25/1,635.54 = 661.27/x
3. Step 3: Cross multiply
   1,185.25x = 1,635.54 × 661.27
4. Step 4: Simplify right side
   1,185.25x = 1,081,533.54
5. Step 5: Solve for x
   x = 1,081,533.54/1,185.25
6. Step 6: Final answer
   x = 912.49