Finding the Fourth Proportional to 62.96, 86.81 and 42.22

Step by Step Solution

1. Step 1: Write the proportion equation
   62.96 : 86.81 = 42.22 : x
2. Step 2: Convert to fraction form
   62.96/86.81 = 42.22/x
3. Step 3: Cross multiply
   62.96x = 86.81 × 42.22
4. Step 4: Simplify right side
   62.96x = 3,665.02
5. Step 5: Solve for x
   x = 3,665.02/62.96
6. Step 6: Final answer
   x = 58.21