Finding the Third Proportional to 621.56 and 1,443.94

Step by Step Solution

1. Step 1: Write the proportion equation
   621.56 : 1,443.94 = 1,443.94 : x
2. Step 2: Convert to fraction form
   621.56/1,443.94 = 1,443.94/x
3. Step 3: Cross multiply
   621.56x = 1,443.94 × 1,443.94
4. Step 4: Simplify right side
   621.56x = 2,084,955.50
5. Step 5: Solve for x
   x = 2,084,955.50/621.56
6. Step 6: Final answer
   x = 3,354.38