Finding the Fourth Proportional to 111.90, 167.63 and 73.34

Step by Step Solution

1. Step 1: Write the proportion equation
   111.90 : 167.63 = 73.34 : x
2. Step 2: Convert to fraction form
   111.90/167.63 = 73.34/x
3. Step 3: Cross multiply
   111.90x = 167.63 × 73.34
4. Step 4: Simplify right side
   111.90x = 12,292.78
5. Step 5: Solve for x
   x = 12,292.78/111.90
6. Step 6: Final answer
   x = 109.86