Finding the Fourth Proportional to 112.53, 168.69 and 76.47

Step by Step Solution

1. Step 1: Write the proportion equation
   112.53 : 168.69 = 76.47 : x
2. Step 2: Convert to fraction form
   112.53/168.69 = 76.47/x
3. Step 3: Cross multiply
   112.53x = 168.69 × 76.47
4. Step 4: Simplify right side
   112.53x = 12,899.72
5. Step 5: Solve for x
   x = 12,899.72/112.53
6. Step 6: Final answer
   x = 114.63