Finding the Fourth Proportional to 71.31, 106.98 and 43.94

Step by Step Solution

1. Step 1: Write the proportion equation
   71.31 : 106.98 = 43.94 : x
2. Step 2: Convert to fraction form
   71.31/106.98 = 43.94/x
3. Step 3: Cross multiply
   71.31x = 106.98 × 43.94
4. Step 4: Simplify right side
   71.31x = 4,700.17
5. Step 5: Solve for x
   x = 4,700.17/71.31
6. Step 6: Final answer
   x = 65.91