Finding the Third Proportional to 99.38 and 145.22

Step by Step Solution

1. Step 1: Write the proportion equation
   99.38 : 145.22 = 145.22 : x
2. Step 2: Convert to fraction form
   99.38/145.22 = 145.22/x
3. Step 3: Cross multiply
   99.38x = 145.22 × 145.22
4. Step 4: Simplify right side
   99.38x = 21,088.49
5. Step 5: Solve for x
   x = 21,088.49/99.38
6. Step 6: Final answer
   x = 212.21