Finding the Fourth Proportional to 144,300.81, 199,139.37 and 80,638.76

Step by Step Solution

1. Step 1: Write the proportion equation
   144,300.81 : 199,139.37 = 80,638.76 : x
2. Step 2: Convert to fraction form
   144,300.81/199,139.37 = 80,638.76/x
3. Step 3: Cross multiply
   144,300.81x = 199,139.37 × 80,638.76
4. Step 4: Simplify right side
   144,300.81x = 16,058,351,863.98
5. Step 5: Solve for x
   x = 16,058,351,863.98/144,300.81
6. Step 6: Final answer
   x = 111,283.87