Finding the Fourth Proportional to 67.40, 100.94 and 51.17

Step by Step Solution

1. Step 1: Write the proportion equation
   67.40 : 100.94 = 51.17 : x
2. Step 2: Convert to fraction form
   67.40/100.94 = 51.17/x
3. Step 3: Cross multiply
   67.40x = 100.94 × 51.17
4. Step 4: Simplify right side
   67.40x = 5,164.34
5. Step 5: Solve for x
   x = 5,164.34/67.40
6. Step 6: Final answer
   x = 76.63