Finding the Fourth Proportional to 1,185.44, 1,635.88 and 661.52

Step by Step Solution

1. Step 1: Write the proportion equation
   1,185.44 : 1,635.88 = 661.52 : x
2. Step 2: Convert to fraction form
   1,185.44/1,635.88 = 661.52/x
3. Step 3: Cross multiply
   1,185.44x = 1,635.88 × 661.52
4. Step 4: Simplify right side
   1,185.44x = 1,082,167.34
5. Step 5: Solve for x
   x = 1,082,167.34/1,185.44
6. Step 6: Final answer
   x = 912.88