Finding the Fourth Proportional to 74.67, 111.89 and 45.71

Step by Step Solution

1. Step 1: Write the proportion equation
   74.67 : 111.89 = 45.71 : x
2. Step 2: Convert to fraction form
   74.67/111.89 = 45.71/x
3. Step 3: Cross multiply
   74.67x = 111.89 × 45.71
4. Step 4: Simplify right side
   74.67x = 5,114.47
5. Step 5: Solve for x
   x = 5,114.47/74.67
6. Step 6: Final answer
   x = 68.50