Finding the Fourth Proportional to 71.46, 105.68 and 71.46

Step by Step Solution

1. Step 1: Write the proportion equation
   71.46 : 105.68 = 71.46 : x
2. Step 2: Convert to fraction form
   71.46/105.68 = 71.46/x
3. Step 3: Cross multiply
   71.46x = 105.68 × 71.46
4. Step 4: Simplify right side
   71.46x = 7,551.89
5. Step 5: Solve for x
   x = 7,551.89/71.46
6. Step 6: Final answer
   x = 105.68