Finding the Third Proportional to 60.89 and 143.72

Step by Step Solution

1. Step 1: Write the proportion equation
   60.89 : 143.72 = 143.72 : x
2. Step 2: Convert to fraction form
   60.89/143.72 = 143.72/x
3. Step 3: Cross multiply
   60.89x = 143.72 × 143.72
4. Step 4: Simplify right side
   60.89x = 20,655.08
5. Step 5: Solve for x
   x = 20,655.08/60.89
6. Step 6: Final answer
   x = 339.22