Finding the Third Proportional to 1.42 and 3.72

Step by Step Solution

1. Step 1: Write the proportion equation
   1.42 : 3.72 = 3.72 : x
2. Step 2: Convert to fraction form
   1.42/3.72 = 3.72/x
3. Step 3: Cross multiply
   1.42x = 3.72 × 3.72
4. Step 4: Simplify right side
   1.42x = 13.82
5. Step 5: Solve for x
   x = 13.82/1.42
6. Step 6: Final answer
   x = 9.76