Finding the Third Proportional to 40.31 and 58.31

Step by Step Solution

1. Step 1: Write the proportion equation
   40.31 : 58.31 = 58.31 : x
2. Step 2: Convert to fraction form
   40.31/58.31 = 58.31/x
3. Step 3: Cross multiply
   40.31x = 58.31 × 58.31
4. Step 4: Simplify right side
   40.31x = 3,400.35
5. Step 5: Solve for x
   x = 3,400.35/40.31
6. Step 6: Final answer
   x = 84.35