Finding the Fourth Proportional to 100.03, 149.69 and 71.18

Step by Step Solution

1. Step 1: Write the proportion equation
   100.03 : 149.69 = 71.18 : x
2. Step 2: Convert to fraction form
   100.03/149.69 = 71.18/x
3. Step 3: Cross multiply
   100.03x = 149.69 × 71.18
4. Step 4: Simplify right side
   100.03x = 10,654.93
5. Step 5: Solve for x
   x = 10,654.93/100.03
6. Step 6: Final answer
   x = 106.52