Finding the Third Proportional to 917.94 and 1,308.56

Step by Step Solution

1. Step 1: Write the proportion equation
   917.94 : 1,308.56 = 1,308.56 : x
2. Step 2: Convert to fraction form
   917.94/1,308.56 = 1,308.56/x
3. Step 3: Cross multiply
   917.94x = 1,308.56 × 1,308.56
4. Step 4: Simplify right side
   917.94x = 1,712,335.82
5. Step 5: Solve for x
   x = 1,712,335.82/917.94
6. Step 6: Final answer
   x = 1,865.42