Finding the Fourth Proportional to 148.50, 222.83 and 72.50

Step by Step Solution

1. Step 1: Write the proportion equation
   148.50 : 222.83 = 72.50 : x
2. Step 2: Convert to fraction form
   148.50/222.83 = 72.50/x
3. Step 3: Cross multiply
   148.50x = 222.83 × 72.50
4. Step 4: Simplify right side
   148.50x = 16,155.18
5. Step 5: Solve for x
   x = 16,155.18/148.50
6. Step 6: Final answer
   x = 108.79