Finding the Third Proportional to 31.45 and 42.35

Step by Step Solution

1. Step 1: Write the proportion equation
   31.45 : 42.35 = 42.35 : x
2. Step 2: Convert to fraction form
   31.45/42.35 = 42.35/x
3. Step 3: Cross multiply
   31.45x = 42.35 × 42.35
4. Step 4: Simplify right side
   31.45x = 1,793.65
5. Step 5: Solve for x
   x = 1,793.65/31.45
6. Step 6: Final answer
   x = 57.03