Finding the Fourth Proportional to 100.89, 151.33 and 67.87

Step by Step Solution

1. Step 1: Write the proportion equation
   100.89 : 151.33 = 67.87 : x
2. Step 2: Convert to fraction form
   100.89/151.33 = 67.87/x
3. Step 3: Cross multiply
   100.89x = 151.33 × 67.87
4. Step 4: Simplify right side
   100.89x = 10,270.22
5. Step 5: Solve for x
   x = 10,270.22/100.89
6. Step 6: Final answer
   x = 101.80