Finding the Third Proportional to 308.81 and 492.33

Step by Step Solution

1. Step 1: Write the proportion equation
   308.81 : 492.33 = 492.33 : x
2. Step 2: Convert to fraction form
   308.81/492.33 = 492.33/x
3. Step 3: Cross multiply
   308.81x = 492.33 × 492.33
4. Step 4: Simplify right side
   308.81x = 242,386.98
5. Step 5: Solve for x
   x = 242,386.98/308.81
6. Step 6: Final answer
   x = 784.90