Finding the Fourth Proportional to 101.98, 152.98 and 67.78

Step by Step Solution

1. Step 1: Write the proportion equation
   101.98 : 152.98 = 67.78 : x
2. Step 2: Convert to fraction form
   101.98/152.98 = 67.78/x
3. Step 3: Cross multiply
   101.98x = 152.98 × 67.78
4. Step 4: Simplify right side
   101.98x = 10,369.01
5. Step 5: Solve for x
   x = 10,369.01/101.98
6. Step 6: Final answer
   x = 101.68