Finding the Fourth Proportional to 123.82, 170.71 and 101.98

Step by Step Solution

1. Step 1: Write the proportion equation
   123.82 : 170.71 = 101.98 : x
2. Step 2: Convert to fraction form
   123.82/170.71 = 101.98/x
3. Step 3: Cross multiply
   123.82x = 170.71 × 101.98
4. Step 4: Simplify right side
   123.82x = 17,409.01
5. Step 5: Solve for x
   x = 17,409.01/123.82
6. Step 6: Final answer
   x = 140.60