Finding the Fourth Proportional to 112.86, 168.50 and 100.74

Step by Step Solution

1. Step 1: Write the proportion equation
   112.86 : 168.50 = 100.74 : x
2. Step 2: Convert to fraction form
   112.86/168.50 = 100.74/x
3. Step 3: Cross multiply
   112.86x = 168.50 × 100.74
4. Step 4: Simplify right side
   112.86x = 16,974.19
5. Step 5: Solve for x
   x = 16,974.19/112.86
6. Step 6: Final answer
   x = 150.40