Finding the Fourth Proportional to 113.43, 171.06 and 100.71

Step by Step Solution

1. Step 1: Write the proportion equation
   113.43 : 171.06 = 100.71 : x
2. Step 2: Convert to fraction form
   113.43/171.06 = 100.71/x
3. Step 3: Cross multiply
   113.43x = 171.06 × 100.71
4. Step 4: Simplify right side
   113.43x = 17,227.45
5. Step 5: Solve for x
   x = 17,227.45/113.43
6. Step 6: Final answer
   x = 151.88