Finding the Fourth Proportional to 143.41, 214.83 and 100.09

Step by Step Solution

1. Step 1: Write the proportion equation
   143.41 : 214.83 = 100.09 : x
2. Step 2: Convert to fraction form
   143.41/214.83 = 100.09/x
3. Step 3: Cross multiply
   143.41x = 214.83 × 100.09
4. Step 4: Simplify right side
   143.41x = 21,502.33
5. Step 5: Solve for x
   x = 21,502.33/143.41
6. Step 6: Final answer
   x = 149.94