Finding the Fourth Proportional to 112.86, 169.16 and 100.71

Step by Step Solution

1. Step 1: Write the proportion equation
   112.86 : 169.16 = 100.71 : x
2. Step 2: Convert to fraction form
   112.86/169.16 = 100.71/x
3. Step 3: Cross multiply
   112.86x = 169.16 × 100.71
4. Step 4: Simplify right side
   112.86x = 17,035.60
5. Step 5: Solve for x
   x = 17,035.60/112.86
6. Step 6: Final answer
   x = 150.94