Finding the Fourth Proportional to 76.72, 105.87 and 43.98

Step by Step Solution

1. Step 1: Write the proportion equation
   76.72 : 105.87 = 43.98 : x
2. Step 2: Convert to fraction form
   76.72/105.87 = 43.98/x
3. Step 3: Cross multiply
   76.72x = 105.87 × 43.98
4. Step 4: Simplify right side
   76.72x = 4,656.16
5. Step 5: Solve for x
   x = 4,656.16/76.72
6. Step 6: Final answer
   x = 60.69