Finding the Fourth Proportional to 111,978.95, 167,869.24 and 80,309.37

Step by Step Solution

1. Step 1: Write the proportion equation
   111,978.95 : 167,869.24 = 80,309.37 : x
2. Step 2: Convert to fraction form
   111,978.95/167,869.24 = 80,309.37/x
3. Step 3: Cross multiply
   111,978.95x = 167,869.24 × 80,309.37
4. Step 4: Simplify right side
   111,978.95x = 13,481,472,076.50
5. Step 5: Solve for x
   x = 13,481,472,076.50/111,978.95
6. Step 6: Final answer
   x = 120,392.92