Finding the Fourth Proportional to 127.98, 191.54 and 100.98

Step by Step Solution

1. Step 1: Write the proportion equation
   127.98 : 191.54 = 100.98 : x
2. Step 2: Convert to fraction form
   127.98/191.54 = 100.98/x
3. Step 3: Cross multiply
   127.98x = 191.54 × 100.98
4. Step 4: Simplify right side
   127.98x = 19,341.71
5. Step 5: Solve for x
   x = 19,341.71/127.98
6. Step 6: Final answer
   x = 151.13