Finding the Third Proportional to 90.39 and 195.01

Step by Step Solution

1. Step 1: Write the proportion equation
   90.39 : 195.01 = 195.01 : x
2. Step 2: Convert to fraction form
   90.39/195.01 = 195.01/x
3. Step 3: Cross multiply
   90.39x = 195.01 × 195.01
4. Step 4: Simplify right side
   90.39x = 38,029.57
5. Step 5: Solve for x
   x = 38,029.57/90.39
6. Step 6: Final answer
   x = 420.74