Finding the Fourth Proportional to 62.82, 86.74 and 42.10

Step by Step Solution

1. Step 1: Write the proportion equation
   62.82 : 86.74 = 42.10 : x
2. Step 2: Convert to fraction form
   62.82/86.74 = 42.10/x
3. Step 3: Cross multiply
   62.82x = 86.74 × 42.10
4. Step 4: Simplify right side
   62.82x = 3,651.75
5. Step 5: Solve for x
   x = 3,651.75/62.82
6. Step 6: Final answer
   x = 58.13