Finding the Third Proportional to 931.69 and 1,208.81

Step by Step Solution

1. Step 1: Write the proportion equation
   931.69 : 1,208.81 = 1,208.81 : x
2. Step 2: Convert to fraction form
   931.69/1,208.81 = 1,208.81/x
3. Step 3: Cross multiply
   931.69x = 1,208.81 × 1,208.81
4. Step 4: Simplify right side
   931.69x = 1,461,227.66
5. Step 5: Solve for x
   x = 1,461,227.66/931.69
6. Step 6: Final answer
   x = 1,568.37