Finding the Fourth Proportional to 103.82, 143.25 and 100.34

Step by Step Solution

1. Step 1: Write the proportion equation
   103.82 : 143.25 = 100.34 : x
2. Step 2: Convert to fraction form
   103.82/143.25 = 100.34/x
3. Step 3: Cross multiply
   103.82x = 143.25 × 100.34
4. Step 4: Simplify right side
   103.82x = 14,373.71
5. Step 5: Solve for x
   x = 14,373.71/103.82
6. Step 6: Final answer
   x = 138.46