Finding the Fourth Proportional to 74.49, 111.59 and 45.56

Step by Step Solution

1. Step 1: Write the proportion equation
   74.49 : 111.59 = 45.56 : x
2. Step 2: Convert to fraction form
   74.49/111.59 = 45.56/x
3. Step 3: Cross multiply
   74.49x = 111.59 × 45.56
4. Step 4: Simplify right side
   74.49x = 5,084.52
5. Step 5: Solve for x
   x = 5,084.52/74.49
6. Step 6: Final answer
   x = 68.26