Finding the Fourth Proportional to 62.82, 86.58 and 42.06

Step by Step Solution

1. Step 1: Write the proportion equation
   62.82 : 86.58 = 42.06 : x
2. Step 2: Convert to fraction form
   62.82/86.58 = 42.06/x
3. Step 3: Cross multiply
   62.82x = 86.58 × 42.06
4. Step 4: Simplify right side
   62.82x = 3,641.55
5. Step 5: Solve for x
   x = 3,641.55/62.82
6. Step 6: Final answer
   x = 57.97