Finding the Fourth Proportional to 215.82, 297.72 and 142.10

Step by Step Solution

1. Step 1: Write the proportion equation
   215.82 : 297.72 = 142.10 : x
2. Step 2: Convert to fraction form
   215.82/297.72 = 142.10/x
3. Step 3: Cross multiply
   215.82x = 297.72 × 142.10
4. Step 4: Simplify right side
   215.82x = 42,306.01
5. Step 5: Solve for x
   x = 42,306.01/215.82
6. Step 6: Final answer
   x = 196.02