Finding the Third Proportional to 103.63 and 145.31

Step by Step Solution

1. Step 1: Write the proportion equation
   103.63 : 145.31 = 145.31 : x
2. Step 2: Convert to fraction form
   103.63/145.31 = 145.31/x
3. Step 3: Cross multiply
   103.63x = 145.31 × 145.31
4. Step 4: Simplify right side
   103.63x = 21,115.72
5. Step 5: Solve for x
   x = 21,115.72/103.63
6. Step 6: Final answer
   x = 203.77