Finding the Fourth Proportional to 139.98, 209.37 and 101.02

Step by Step Solution

1. Step 1: Write the proportion equation
   139.98 : 209.37 = 101.02 : x
2. Step 2: Convert to fraction form
   139.98/209.37 = 101.02/x
3. Step 3: Cross multiply
   139.98x = 209.37 × 101.02
4. Step 4: Simplify right side
   139.98x = 21,150.05
5. Step 5: Solve for x
   x = 21,150.05/139.98
6. Step 6: Final answer
   x = 151.09