Finding the Fourth Proportional to 144,978.64, 200,072.10 and 80,449

Step by Step Solution

1. Step 1: Write the proportion equation
   144,978.64 : 200,072.10 = 80,449 : x
2. Step 2: Convert to fraction form
   144,978.64/200,072.10 = 80,449/x
3. Step 3: Cross multiply
   144,978.64x = 200,072.10 × 80,449
4. Step 4: Simplify right side
   144,978.64x = 16,095,600,372.90
5. Step 5: Solve for x
   x = 16,095,600,372.90/144,978.64
6. Step 6: Final answer
   x = 111,020.49