Finding the Fourth Proportional to 72.98, 100.71 and 48.42

Step by Step Solution

1. Step 1: Write the proportion equation
   72.98 : 100.71 = 48.42 : x
2. Step 2: Convert to fraction form
   72.98/100.71 = 48.42/x
3. Step 3: Cross multiply
   72.98x = 100.71 × 48.42
4. Step 4: Simplify right side
   72.98x = 4,876.38
5. Step 5: Solve for x
   x = 4,876.38/72.98
6. Step 6: Final answer
   x = 66.82