Finding the Fourth Proportional to 99.98, 137.89 and 92.71

Step by Step Solution

1. Step 1: Write the proportion equation
   99.98 : 137.89 = 92.71 : x
2. Step 2: Convert to fraction form
   99.98/137.89 = 92.71/x
3. Step 3: Cross multiply
   99.98x = 137.89 × 92.71
4. Step 4: Simplify right side
   99.98x = 12,783.78
5. Step 5: Solve for x
   x = 12,783.78/99.98
6. Step 6: Final answer
   x = 127.86