Finding the Fourth Proportional to 123.10, 183.86 and 101.31

Step by Step Solution

1. Step 1: Write the proportion equation
   123.10 : 183.86 = 101.31 : x
2. Step 2: Convert to fraction form
   123.10/183.86 = 101.31/x
3. Step 3: Cross multiply
   123.10x = 183.86 × 101.31
4. Step 4: Simplify right side
   123.10x = 18,626.86
5. Step 5: Solve for x
   x = 18,626.86/123.10
6. Step 6: Final answer
   x = 151.31