Finding the Fourth Proportional to 404.52, 606.76 and 148

Step by Step Solution

1. Step 1: Write the proportion equation
   404.52 : 606.76 = 148 : x
2. Step 2: Convert to fraction form
   404.52/606.76 = 148/x
3. Step 3: Cross multiply
   404.52x = 606.76 × 148
4. Step 4: Simplify right side
   404.52x = 89,800.48
5. Step 5: Solve for x
   x = 89,800.48/404.52
6. Step 6: Final answer
   x = 221.99