Finding the Third Proportional to 621.56 and 883.56

Step by Step Solution

1. Step 1: Write the proportion equation
   621.56 : 883.56 = 883.56 : x
2. Step 2: Convert to fraction form
   621.56/883.56 = 883.56/x
3. Step 3: Cross multiply
   621.56x = 883.56 × 883.56
4. Step 4: Simplify right side
   621.56x = 780,682.69
5. Step 5: Solve for x
   x = 780,682.69/621.56
6. Step 6: Final answer
   x = 1,256.00