Finding the Fourth Proportional to 139.91, 209.89 and 58.82

Step by Step Solution

1. Step 1: Write the proportion equation
   139.91 : 209.89 = 58.82 : x
2. Step 2: Convert to fraction form
   139.91/209.89 = 58.82/x
3. Step 3: Cross multiply
   139.91x = 209.89 × 58.82
4. Step 4: Simplify right side
   139.91x = 12,344.68
5. Step 5: Solve for x
   x = 12,344.68/139.91
6. Step 6: Final answer
   x = 88.23