Finding the Fourth Proportional to 62.77, 86.71 and 42.09

Step by Step Solution

1. Step 1: Write the proportion equation
   62.77 : 86.71 = 42.09 : x
2. Step 2: Convert to fraction form
   62.77/86.71 = 42.09/x
3. Step 3: Cross multiply
   62.77x = 86.71 × 42.09
4. Step 4: Simplify right side
   62.77x = 3,649.62
5. Step 5: Solve for x
   x = 3,649.62/62.77
6. Step 6: Final answer
   x = 58.14