Finding the Fourth Proportional to 139.59, 209.37 and 48.29

Step by Step Solution

1. Step 1: Write the proportion equation
   139.59 : 209.37 = 48.29 : x
2. Step 2: Convert to fraction form
   139.59/209.37 = 48.29/x
3. Step 3: Cross multiply
   139.59x = 209.37 × 48.29
4. Step 4: Simplify right side
   139.59x = 10,109.61
5. Step 5: Solve for x
   x = 10,109.61/139.59
6. Step 6: Final answer
   x = 72.42