Finding the Fourth Proportional to 47.98, 71.50 and 43.42

Step by Step Solution

1. Step 1: Write the proportion equation
   47.98 : 71.50 = 43.42 : x
2. Step 2: Convert to fraction form
   47.98/71.50 = 43.42/x
3. Step 3: Cross multiply
   47.98x = 71.50 × 43.42
4. Step 4: Simplify right side
   47.98x = 3,104.53
5. Step 5: Solve for x
   x = 3,104.53/47.98
6. Step 6: Final answer
   x = 64.70