Finding the Fourth Proportional to 139.82, 209.82 and 58.73

Step by Step Solution

1. Step 1: Write the proportion equation
   139.82 : 209.82 = 58.73 : x
2. Step 2: Convert to fraction form
   139.82/209.82 = 58.73/x
3. Step 3: Cross multiply
   139.82x = 209.82 × 58.73
4. Step 4: Simplify right side
   139.82x = 12,322.73
5. Step 5: Solve for x
   x = 12,322.73/139.82
6. Step 6: Final answer
   x = 88.13