Finding the Fourth Proportional to 76.51, 114.72 and 42.25

Step by Step Solution

1. Step 1: Write the proportion equation
   76.51 : 114.72 = 42.25 : x
2. Step 2: Convert to fraction form
   76.51/114.72 = 42.25/x
3. Step 3: Cross multiply
   76.51x = 114.72 × 42.25
4. Step 4: Simplify right side
   76.51x = 4,846.92
5. Step 5: Solve for x
   x = 4,846.92/76.51
6. Step 6: Final answer
   x = 63.35