Finding the Fourth Proportional to 123.31, 169.86 and 111.01

Step by Step Solution

1. Step 1: Write the proportion equation
   123.31 : 169.86 = 111.01 : x
2. Step 2: Convert to fraction form
   123.31/169.86 = 111.01/x
3. Step 3: Cross multiply
   123.31x = 169.86 × 111.01
4. Step 4: Simplify right side
   123.31x = 18,856.16
5. Step 5: Solve for x
   x = 18,856.16/123.31
6. Step 6: Final answer
   x = 152.92