Finding the Third Proportional to 200.06 and 309.56

Step by Step Solution

1. Step 1: Write the proportion equation
   200.06 : 309.56 = 309.56 : x
2. Step 2: Convert to fraction form
   200.06/309.56 = 309.56/x
3. Step 3: Cross multiply
   200.06x = 309.56 × 309.56
4. Step 4: Simplify right side
   200.06x = 95,828.94
5. Step 5: Solve for x
   x = 95,828.94/200.06
6. Step 6: Final answer
   x = 479.00