Finding the Fourth Proportional to 111.90, 167.76 and 60.50

Step by Step Solution

1. Step 1: Write the proportion equation
   111.90 : 167.76 = 60.50 : x
2. Step 2: Convert to fraction form
   111.90/167.76 = 60.50/x
3. Step 3: Cross multiply
   111.90x = 167.76 × 60.50
4. Step 4: Simplify right side
   111.90x = 10,149.48
5. Step 5: Solve for x
   x = 10,149.48/111.90
6. Step 6: Final answer
   x = 90.70