Finding the Fourth Proportional to 1,185.83, 1,636.06 and 661.76

Step by Step Solution

1. Step 1: Write the proportion equation
   1,185.83 : 1,636.06 = 661.76 : x
2. Step 2: Convert to fraction form
   1,185.83/1,636.06 = 661.76/x
3. Step 3: Cross multiply
   1,185.83x = 1,636.06 × 661.76
4. Step 4: Simplify right side
   1,185.83x = 1,082,679.07
5. Step 5: Solve for x
   x = 1,082,679.07/1,185.83
6. Step 6: Final answer
   x = 913.01