Finding the Fourth Proportional to 1,185.94, 1,636.50 and 661.94

Step by Step Solution

1. Step 1: Write the proportion equation
   1,185.94 : 1,636.50 = 661.94 : x
2. Step 2: Convert to fraction form
   1,185.94/1,636.50 = 661.94/x
3. Step 3: Cross multiply
   1,185.94x = 1,636.50 × 661.94
4. Step 4: Simplify right side
   1,185.94x = 1,083,264.81
5. Step 5: Solve for x
   x = 1,083,264.81/1,185.94
6. Step 6: Final answer
   x = 913.42