Finding the Fourth Proportional to 1,185.33, 1,635.84 and 661.35

Step by Step Solution

1. Step 1: Write the proportion equation
   1,185.33 : 1,635.84 = 661.35 : x
2. Step 2: Convert to fraction form
   1,185.33/1,635.84 = 661.35/x
3. Step 3: Cross multiply
   1,185.33x = 1,635.84 × 661.35
4. Step 4: Simplify right side
   1,185.33x = 1,081,862.78
5. Step 5: Solve for x
   x = 1,081,862.78/1,185.33
6. Step 6: Final answer
   x = 912.71