Finding the Fourth Proportional to 111,450.56, 167,218.50 and 67,109

Step by Step Solution

1. Step 1: Write the proportion equation
   111,450.56 : 167,218.50 = 67,109 : x
2. Step 2: Convert to fraction form
   111,450.56/167,218.50 = 67,109/x
3. Step 3: Cross multiply
   111,450.56x = 167,218.50 × 67,109
4. Step 4: Simplify right side
   111,450.56x = 11,221,866,316.50
5. Step 5: Solve for x
   x = 11,221,866,316.50/111,450.56
6. Step 6: Final answer
   x = 100,689.19