Finding the Fourth Proportional to 127.35, 175.83 and 99.67

Step by Step Solution

1. Step 1: Write the proportion equation
   127.35 : 175.83 = 99.67 : x
2. Step 2: Convert to fraction form
   127.35/175.83 = 99.67/x
3. Step 3: Cross multiply
   127.35x = 175.83 × 99.67
4. Step 4: Simplify right side
   127.35x = 17,524.98
5. Step 5: Solve for x
   x = 17,524.98/127.35
6. Step 6: Final answer
   x = 137.61