Finding the Fourth Proportional to 139.41, 209.25 and 101.10

Step by Step Solution

1. Step 1: Write the proportion equation
   139.41 : 209.25 = 101.10 : x
2. Step 2: Convert to fraction form
   139.41/209.25 = 101.10/x
3. Step 3: Cross multiply
   139.41x = 209.25 × 101.10
4. Step 4: Simplify right side
   139.41x = 21,155.18
5. Step 5: Solve for x
   x = 21,155.18/139.41
6. Step 6: Final answer
   x = 151.75