Finding the Third Proportional to 286.06 and 388.56

Step by Step Solution

1. Step 1: Write the proportion equation
   286.06 : 388.56 = 388.56 : x
2. Step 2: Convert to fraction form
   286.06/388.56 = 388.56/x
3. Step 3: Cross multiply
   286.06x = 388.56 × 388.56
4. Step 4: Simplify right side
   286.06x = 150,980.82
5. Step 5: Solve for x
   x = 150,980.82/286.06
6. Step 6: Final answer
   x = 527.79