Finding the Third Proportional to 139.54 and 293.31

Step by Step Solution

1. Step 1: Write the proportion equation
   139.54 : 293.31 = 293.31 : x
2. Step 2: Convert to fraction form
   139.54/293.31 = 293.31/x
3. Step 3: Cross multiply
   139.54x = 293.31 × 293.31
4. Step 4: Simplify right side
   139.54x = 86,029.93
5. Step 5: Solve for x
   x = 86,029.93/139.54
6. Step 6: Final answer
   x = 616.55