Finding the Fourth Proportional to 67.08, 100.54 and 42.98

Step by Step Solution

1. Step 1: Write the proportion equation
   67.08 : 100.54 = 42.98 : x
2. Step 2: Convert to fraction form
   67.08/100.54 = 42.98/x
3. Step 3: Cross multiply
   67.08x = 100.54 × 42.98
4. Step 4: Simplify right side
   67.08x = 4,321.21
5. Step 5: Solve for x
   x = 4,321.21/67.08
6. Step 6: Final answer
   x = 64.42