Finding the Third Proportional to 69.03 and 143.78

Step by Step Solution

1. Step 1: Write the proportion equation
   69.03 : 143.78 = 143.78 : x
2. Step 2: Convert to fraction form
   69.03/143.78 = 143.78/x
3. Step 3: Cross multiply
   69.03x = 143.78 × 143.78
4. Step 4: Simplify right side
   69.03x = 20,673.05
5. Step 5: Solve for x
   x = 20,673.05/69.03
6. Step 6: Final answer
   x = 299.47