Finding the Third Proportional to 145.88 and 210.69

Step by Step Solution

1. Step 1: Write the proportion equation
   145.88 : 210.69 = 210.69 : x
2. Step 2: Convert to fraction form
   145.88/210.69 = 210.69/x
3. Step 3: Cross multiply
   145.88x = 210.69 × 210.69
4. Step 4: Simplify right side
   145.88x = 44,389.22
5. Step 5: Solve for x
   x = 44,389.22/145.88
6. Step 6: Final answer
   x = 304.30