Finding the Fourth Proportional to 112.50, 155.25 and 73.69

Step by Step Solution

1. Step 1: Write the proportion equation
   112.50 : 155.25 = 73.69 : x
2. Step 2: Convert to fraction form
   112.50/155.25 = 73.69/x
3. Step 3: Cross multiply
   112.50x = 155.25 × 73.69
4. Step 4: Simplify right side
   112.50x = 11,439.98
5. Step 5: Solve for x
   x = 11,439.98/112.50
6. Step 6: Final answer
   x = 101.69