Finding the Fourth Proportional to 67.08, 100.47 and 40.05

Step by Step Solution

1. Step 1: Write the proportion equation
   67.08 : 100.47 = 40.05 : x
2. Step 2: Convert to fraction form
   67.08/100.47 = 40.05/x
3. Step 3: Cross multiply
   67.08x = 100.47 × 40.05
4. Step 4: Simplify right side
   67.08x = 4,023.82
5. Step 5: Solve for x
   x = 4,023.82/67.08
6. Step 6: Final answer
   x = 59.99