Finding the Fourth Proportional to 99.74, 149.88 and 67.88

Step by Step Solution

1. Step 1: Write the proportion equation
   99.74 : 149.88 = 67.88 : x
2. Step 2: Convert to fraction form
   99.74/149.88 = 67.88/x
3. Step 3: Cross multiply
   99.74x = 149.88 × 67.88
4. Step 4: Simplify right side
   99.74x = 10,173.85
5. Step 5: Solve for x
   x = 10,173.85/99.74
6. Step 6: Final answer
   x = 102.00