Finding the Fourth Proportional to 139.42, 209.42 and 93.83

Step by Step Solution

1. Step 1: Write the proportion equation
   139.42 : 209.42 = 93.83 : x
2. Step 2: Convert to fraction form
   139.42/209.42 = 93.83/x
3. Step 3: Cross multiply
   139.42x = 209.42 × 93.83
4. Step 4: Simplify right side
   139.42x = 19,648.71
5. Step 5: Solve for x
   x = 19,648.71/139.42
6. Step 6: Final answer
   x = 140.93