Finding the Fourth Proportional to 100.73, 150.22 and 91.01

Step by Step Solution

1. Step 1: Write the proportion equation
   100.73 : 150.22 = 91.01 : x
2. Step 2: Convert to fraction form
   100.73/150.22 = 91.01/x
3. Step 3: Cross multiply
   100.73x = 150.22 × 91.01
4. Step 4: Simplify right side
   100.73x = 13,671.52
5. Step 5: Solve for x
   x = 13,671.52/100.73
6. Step 6: Final answer
   x = 135.72