Finding the Fourth Proportional to 404.78, 606.86 and 148.10

Step by Step Solution

1. Step 1: Write the proportion equation
   404.78 : 606.86 = 148.10 : x
2. Step 2: Convert to fraction form
   404.78/606.86 = 148.10/x
3. Step 3: Cross multiply
   404.78x = 606.86 × 148.10
4. Step 4: Simplify right side
   404.78x = 89,873.30
5. Step 5: Solve for x
   x = 89,873.30/404.78
6. Step 6: Final answer
   x = 222.03