Finding the Fourth Proportional to 200,321.28, 276,456.69 and 115,443.81

Step by Step Solution

1. Step 1: Write the proportion equation
   200,321.28 : 276,456.69 = 115,443.81 : x
2. Step 2: Convert to fraction form
   200,321.28/276,456.69 = 115,443.81/x
3. Step 3: Cross multiply
   200,321.28x = 276,456.69 × 115,443.81
4. Step 4: Simplify right side
   200,321.28x = 31,915,213,593.59
5. Step 5: Solve for x
   x = 31,915,213,593.59/200,321.28
6. Step 6: Final answer
   x = 159,320.14