Finding the Third Proportional to 699.50 and 1,028

Step by Step Solution

1. Step 1: Write the proportion equation
   699.50 : 1,028 = 1,028 : x
2. Step 2: Convert to fraction form
   699.50/1,028 = 1,028/x
3. Step 3: Cross multiply
   699.50x = 1,028 × 1,028
4. Step 4: Simplify right side
   699.50x = 1,056,784
5. Step 5: Solve for x
   x = 1,056,784/699.50
6. Step 6: Final answer
   x = 1,510.77