Finding the Third Proportional to 355.78 and 573.05

Step by Step Solution

1. Step 1: Write the proportion equation
   355.78 : 573.05 = 573.05 : x
2. Step 2: Convert to fraction form
   355.78/573.05 = 573.05/x
3. Step 3: Cross multiply
   355.78x = 573.05 × 573.05
4. Step 4: Simplify right side
   355.78x = 328,382.72
5. Step 5: Solve for x
   x = 328,382.72/355.78
6. Step 6: Final answer
   x = 922.99