Finding the Third Proportional to 698.50 and 1,071

Step by Step Solution

1. Step 1: Write the proportion equation
   698.50 : 1,071 = 1,071 : x
2. Step 2: Convert to fraction form
   698.50/1,071 = 1,071/x
3. Step 3: Cross multiply
   698.50x = 1,071 × 1,071
4. Step 4: Simplify right side
   698.50x = 1,147,041
5. Step 5: Solve for x
   x = 1,147,041/698.50
6. Step 6: Final answer
   x = 1,642.15