Finding the Fourth Proportional to 139.91, 209.82 and 48.59

Step by Step Solution

1. Step 1: Write the proportion equation
   139.91 : 209.82 = 48.59 : x
2. Step 2: Convert to fraction form
   139.91/209.82 = 48.59/x
3. Step 3: Cross multiply
   139.91x = 209.82 × 48.59
4. Step 4: Simplify right side
   139.91x = 10,193.86
5. Step 5: Solve for x
   x = 10,193.86/139.91
6. Step 6: Final answer
   x = 72.86