Finding the Fourth Proportional to 76.71, 114.83 and 42.39

Step by Step Solution

1. Step 1: Write the proportion equation
   76.71 : 114.83 = 42.39 : x
2. Step 2: Convert to fraction form
   76.71/114.83 = 42.39/x
3. Step 3: Cross multiply
   76.71x = 114.83 × 42.39
4. Step 4: Simplify right side
   76.71x = 4,867.43
5. Step 5: Solve for x
   x = 4,867.43/76.71
6. Step 6: Final answer
   x = 63.45