Finding the Fourth Proportional to 76.56, 114.72 and 42.24

Step by Step Solution

1. Step 1: Write the proportion equation
   76.56 : 114.72 = 42.24 : x
2. Step 2: Convert to fraction form
   76.56/114.72 = 42.24/x
3. Step 3: Cross multiply
   76.56x = 114.72 × 42.24
4. Step 4: Simplify right side
   76.56x = 4,845.77
5. Step 5: Solve for x
   x = 4,845.77/76.56
6. Step 6: Final answer
   x = 63.29