Finding the Third Proportional to 621.28 and 1,359.42

Step by Step Solution

1. Step 1: Write the proportion equation
   621.28 : 1,359.42 = 1,359.42 : x
2. Step 2: Convert to fraction form
   621.28/1,359.42 = 1,359.42/x
3. Step 3: Cross multiply
   621.28x = 1,359.42 × 1,359.42
4. Step 4: Simplify right side
   621.28x = 1,848,027.83
5. Step 5: Solve for x
   x = 1,848,027.83/621.28
6. Step 6: Final answer
   x = 2,974.54