Finding the Fourth Proportional to 456.42, 684.56 and 148.27

Step by Step Solution

1. Step 1: Write the proportion equation
   456.42 : 684.56 = 148.27 : x
2. Step 2: Convert to fraction form
   456.42/684.56 = 148.27/x
3. Step 3: Cross multiply
   456.42x = 684.56 × 148.27
4. Step 4: Simplify right side
   456.42x = 101,499.71
5. Step 5: Solve for x
   x = 101,499.71/456.42
6. Step 6: Final answer
   x = 222.38