Finding the Fourth Proportional to 123.34, 169.50 and 111.19

Step by Step Solution

1. Step 1: Write the proportion equation
   123.34 : 169.50 = 111.19 : x
2. Step 2: Convert to fraction form
   123.34/169.50 = 111.19/x
3. Step 3: Cross multiply
   123.34x = 169.50 × 111.19
4. Step 4: Simplify right side
   123.34x = 18,846.71
5. Step 5: Solve for x
   x = 18,846.71/123.34
6. Step 6: Final answer
   x = 152.80