Finding the Fourth Proportional to 191.88, 287.82 and 100.55

Step by Step Solution

1. Step 1: Write the proportion equation
   191.88 : 287.82 = 100.55 : x
2. Step 2: Convert to fraction form
   191.88/287.82 = 100.55/x
3. Step 3: Cross multiply
   191.88x = 287.82 × 100.55
4. Step 4: Simplify right side
   191.88x = 28,941.02
5. Step 5: Solve for x
   x = 28,941.02/191.88
6. Step 6: Final answer
   x = 150.83