Finding the Fourth Proportional to 99.12, 136.71 and 67.98

Step by Step Solution

1. Step 1: Write the proportion equation
   99.12 : 136.71 = 67.98 : x
2. Step 2: Convert to fraction form
   99.12/136.71 = 67.98/x
3. Step 3: Cross multiply
   99.12x = 136.71 × 67.98
4. Step 4: Simplify right side
   99.12x = 9,292.86
5. Step 5: Solve for x
   x = 9,292.86/99.12
6. Step 6: Final answer
   x = 93.76