Finding the Third Proportional to 40.34 and 74.94

Step by Step Solution

1. Step 1: Write the proportion equation
   40.34 : 74.94 = 74.94 : x
2. Step 2: Convert to fraction form
   40.34/74.94 = 74.94/x
3. Step 3: Cross multiply
   40.34x = 74.94 × 74.94
4. Step 4: Simplify right side
   40.34x = 5,615.34
5. Step 5: Solve for x
   x = 5,615.34/40.34
6. Step 6: Final answer
   x = 139.19