Finding the Fourth Proportional to 67.18, 100.52 and 52.69

Step by Step Solution

1. Step 1: Write the proportion equation
   67.18 : 100.52 = 52.69 : x
2. Step 2: Convert to fraction form
   67.18/100.52 = 52.69/x
3. Step 3: Cross multiply
   67.18x = 100.52 × 52.69
4. Step 4: Simplify right side
   67.18x = 5,295.63
5. Step 5: Solve for x
   x = 5,295.63/67.18
6. Step 6: Final answer
   x = 78.83