Finding the Fourth Proportional to 71.98, 107.82 and 49.10

Step by Step Solution

1. Step 1: Write the proportion equation
   71.98 : 107.82 = 49.10 : x
2. Step 2: Convert to fraction form
   71.98/107.82 = 49.10/x
3. Step 3: Cross multiply
   71.98x = 107.82 × 49.10
4. Step 4: Simplify right side
   71.98x = 5,293.96
5. Step 5: Solve for x
   x = 5,293.96/71.98
6. Step 6: Final answer
   x = 73.55