Finding the Fourth Proportional to 1,206.53, 1,665.39 and 709.37

Step by Step Solution

1. Step 1: Write the proportion equation
   1,206.53 : 1,665.39 = 709.37 : x
2. Step 2: Convert to fraction form
   1,206.53/1,665.39 = 709.37/x
3. Step 3: Cross multiply
   1,206.53x = 1,665.39 × 709.37
4. Step 4: Simplify right side
   1,206.53x = 1,181,369.38
5. Step 5: Solve for x
   x = 1,181,369.38/1,206.53
6. Step 6: Final answer
   x = 979.15