Finding the Third Proportional to 84.05 and 123.30

Step by Step Solution

1. Step 1: Write the proportion equation
   84.05 : 123.30 = 123.30 : x
2. Step 2: Convert to fraction form
   84.05/123.30 = 123.30/x
3. Step 3: Cross multiply
   84.05x = 123.30 × 123.30
4. Step 4: Simplify right side
   84.05x = 15,204.05
5. Step 5: Solve for x
   x = 15,204.05/84.05
6. Step 6: Final answer
   x = 180.90