Finding the Third Proportional to 420.94 and 573.38

Step by Step Solution

1. Step 1: Write the proportion equation
   420.94 : 573.38 = 573.38 : x
2. Step 2: Convert to fraction form
   420.94/573.38 = 573.38/x
3. Step 3: Cross multiply
   420.94x = 573.38 × 573.38
4. Step 4: Simplify right side
   420.94x = 328,758.89
5. Step 5: Solve for x
   x = 328,758.89/420.94
6. Step 6: Final answer
   x = 781.02