Finding the Third Proportional to 918.56 and 1,308.94

Step by Step Solution

1. Step 1: Write the proportion equation
   918.56 : 1,308.94 = 1,308.94 : x
2. Step 2: Convert to fraction form
   918.56/1,308.94 = 1,308.94/x
3. Step 3: Cross multiply
   918.56x = 1,308.94 × 1,308.94
4. Step 4: Simplify right side
   918.56x = 1,713,317.38
5. Step 5: Solve for x
   x = 1,713,317.38/918.56
6. Step 6: Final answer
   x = 1,865.22