Finding the Fourth Proportional to 67.10, 100.50 and 42.96

Step by Step Solution

1. Step 1: Write the proportion equation
   67.10 : 100.50 = 42.96 : x
2. Step 2: Convert to fraction form
   67.10/100.50 = 42.96/x
3. Step 3: Cross multiply
   67.10x = 100.50 × 42.96
4. Step 4: Simplify right side
   67.10x = 4,317.48
5. Step 5: Solve for x
   x = 4,317.48/67.10
6. Step 6: Final answer
   x = 64.34