Finding the Third Proportional to 65.81 and 143.33

Step by Step Solution

1. Step 1: Write the proportion equation
   65.81 : 143.33 = 143.33 : x
2. Step 2: Convert to fraction form
   65.81/143.33 = 143.33/x
3. Step 3: Cross multiply
   65.81x = 143.33 × 143.33
4. Step 4: Simplify right side
   65.81x = 20,544.07
5. Step 5: Solve for x
   x = 20,544.07/65.81
6. Step 6: Final answer
   x = 312.16