Finding the Fourth Proportional to 112.50, 155.25 and 65.88

Step by Step Solution

1. Step 1: Write the proportion equation
   112.50 : 155.25 = 65.88 : x
2. Step 2: Convert to fraction form
   112.50/155.25 = 65.88/x
3. Step 3: Cross multiply
   112.50x = 155.25 × 65.88
4. Step 4: Simplify right side
   112.50x = 10,227.49
5. Step 5: Solve for x
   x = 10,227.49/112.50
6. Step 6: Final answer
   x = 90.91