Finding the Fourth Proportional to 100.50, 150.74 and 73.10

Step by Step Solution

1. Step 1: Write the proportion equation
   100.50 : 150.74 = 73.10 : x
2. Step 2: Convert to fraction form
   100.50/150.74 = 73.10/x
3. Step 3: Cross multiply
   100.50x = 150.74 × 73.10
4. Step 4: Simplify right side
   100.50x = 11,019.38
5. Step 5: Solve for x
   x = 11,019.38/100.50
6. Step 6: Final answer
   x = 109.65