Finding the Fourth Proportional to 148.42, 204.83 and 99.42

Step by Step Solution

1. Step 1: Write the proportion equation
   148.42 : 204.83 = 99.42 : x
2. Step 2: Convert to fraction form
   148.42/204.83 = 99.42/x
3. Step 3: Cross multiply
   148.42x = 204.83 × 99.42
4. Step 4: Simplify right side
   148.42x = 20,364.20
5. Step 5: Solve for x
   x = 20,364.20/148.42
6. Step 6: Final answer
   x = 137.21