Finding the Fourth Proportional to 62.99, 86.91 and 42.27

Step by Step Solution

1. Step 1: Write the proportion equation
   62.99 : 86.91 = 42.27 : x
2. Step 2: Convert to fraction form
   62.99/86.91 = 42.27/x
3. Step 3: Cross multiply
   62.99x = 86.91 × 42.27
4. Step 4: Simplify right side
   62.99x = 3,673.69
5. Step 5: Solve for x
   x = 3,673.69/62.99
6. Step 6: Final answer
   x = 58.32