Finding the Fourth Proportional to 1,185.46, 1,635.96 and 661.48

Step by Step Solution

1. Step 1: Write the proportion equation
   1,185.46 : 1,635.96 = 661.48 : x
2. Step 2: Convert to fraction form
   1,185.46/1,635.96 = 661.48/x
3. Step 3: Cross multiply
   1,185.46x = 1,635.96 × 661.48
4. Step 4: Simplify right side
   1,185.46x = 1,082,154.82
5. Step 5: Solve for x
   x = 1,082,154.82/1,185.46
6. Step 6: Final answer
   x = 912.86