Finding the Fourth Proportional to 111.01, 153.01 and 102.07

Step by Step Solution

1. Step 1: Write the proportion equation
   111.01 : 153.01 = 102.07 : x
2. Step 2: Convert to fraction form
   111.01/153.01 = 102.07/x
3. Step 3: Cross multiply
   111.01x = 153.01 × 102.07
4. Step 4: Simplify right side
   111.01x = 15,617.73
5. Step 5: Solve for x
   x = 15,617.73/111.01
6. Step 6: Final answer
   x = 140.69