Finding the Fourth Proportional to 144,359.54, 199,216.42 and 80,697.28

Step by Step Solution

1. Step 1: Write the proportion equation
   144,359.54 : 199,216.42 = 80,697.28 : x
2. Step 2: Convert to fraction form
   144,359.54/199,216.42 = 80,697.28/x
3. Step 3: Cross multiply
   144,359.54x = 199,216.42 × 80,697.28
4. Step 4: Simplify right side
   144,359.54x = 16,076,223,225.34
5. Step 5: Solve for x
   x = 16,076,223,225.34/144,359.54
6. Step 6: Final answer
   x = 111,362.39