Finding the Third Proportional to 647.25 and 999.94

Step by Step Solution

1. Step 1: Write the proportion equation
   647.25 : 999.94 = 999.94 : x
2. Step 2: Convert to fraction form
   647.25/999.94 = 999.94/x
3. Step 3: Cross multiply
   647.25x = 999.94 × 999.94
4. Step 4: Simplify right side
   647.25x = 999,875.00
5. Step 5: Solve for x
   x = 999,875.00/647.25
6. Step 6: Final answer
   x = 1,544.80