Finding the Fourth Proportional to 76.43, 105.48 and 43.69

Step by Step Solution

1. Step 1: Write the proportion equation
   76.43 : 105.48 = 43.69 : x
2. Step 2: Convert to fraction form
   76.43/105.48 = 43.69/x
3. Step 3: Cross multiply
   76.43x = 105.48 × 43.69
4. Step 4: Simplify right side
   76.43x = 4,607.89
5. Step 5: Solve for x
   x = 4,607.89/76.43
6. Step 6: Final answer
   x = 60.29