Finding the Third Proportional to 914.50 and 1,288

Step by Step Solution

1. Step 1: Write the proportion equation
   914.50 : 1,288 = 1,288 : x
2. Step 2: Convert to fraction form
   914.50/1,288 = 1,288/x
3. Step 3: Cross multiply
   914.50x = 1,288 × 1,288
4. Step 4: Simplify right side
   914.50x = 1,658,944
5. Step 5: Solve for x
   x = 1,658,944/914.50
6. Step 6: Final answer
   x = 1,814.04