Finding the Third Proportional to 559.31 and 790.03

Step by Step Solution

1. Step 1: Write the proportion equation
   559.31 : 790.03 = 790.03 : x
2. Step 2: Convert to fraction form
   559.31/790.03 = 790.03/x
3. Step 3: Cross multiply
   559.31x = 790.03 × 790.03
4. Step 4: Simplify right side
   559.31x = 624,149.38
5. Step 5: Solve for x
   x = 624,149.38/559.31
6. Step 6: Final answer
   x = 1,115.92