Finding the Fourth Proportional to 99.99, 149.78 and 67.41

Step by Step Solution

1. Step 1: Write the proportion equation
   99.99 : 149.78 = 67.41 : x
2. Step 2: Convert to fraction form
   99.99/149.78 = 67.41/x
3. Step 3: Cross multiply
   99.99x = 149.78 × 67.41
4. Step 4: Simplify right side
   99.99x = 10,096.84
5. Step 5: Solve for x
   x = 10,096.84/99.99
6. Step 6: Final answer
   x = 100.98