Finding the Third Proportional to 621.56 and 1,404.94

Step by Step Solution

1. Step 1: Write the proportion equation
   621.56 : 1,404.94 = 1,404.94 : x
2. Step 2: Convert to fraction form
   621.56/1,404.94 = 1,404.94/x
3. Step 3: Cross multiply
   621.56x = 1,404.94 × 1,404.94
4. Step 4: Simplify right side
   621.56x = 1,973,849.38
5. Step 5: Solve for x
   x = 1,973,849.38/621.56
6. Step 6: Final answer
   x = 3,175.62