Finding the Fourth Proportional to 200,016.72, 275,893.02 and 128,283.12

Step by Step Solution

1. Step 1: Write the proportion equation
   200,016.72 : 275,893.02 = 128,283.12 : x
2. Step 2: Convert to fraction form
   200,016.72/275,893.02 = 128,283.12/x
3. Step 3: Cross multiply
   200,016.72x = 275,893.02 × 128,283.12
4. Step 4: Simplify right side
   200,016.72x = 35,392,417,391.82
5. Step 5: Solve for x
   x = 35,392,417,391.82/200,016.72
6. Step 6: Final answer
   x = 176,947.29