Finding the Third Proportional to 644.06 and 1,011.94

Step by Step Solution

1. Step 1: Write the proportion equation
   644.06 : 1,011.94 = 1,011.94 : x
2. Step 2: Convert to fraction form
   644.06/1,011.94 = 1,011.94/x
3. Step 3: Cross multiply
   644.06x = 1,011.94 × 1,011.94
4. Step 4: Simplify right side
   644.06x = 1,024,017.50
5. Step 5: Solve for x
   x = 1,024,017.50/644.06
6. Step 6: Final answer
   x = 1,589.93