Finding the Fourth Proportional to 200,684.88, 276,705.72 and 129,067.92

Step by Step Solution

1. Step 1: Write the proportion equation
   200,684.88 : 276,705.72 = 129,067.92 : x
2. Step 2: Convert to fraction form
   200,684.88/276,705.72 = 129,067.92/x
3. Step 3: Cross multiply
   200,684.88x = 276,705.72 × 129,067.92
4. Step 4: Simplify right side
   200,684.88x = 35,713,831,732.50
5. Step 5: Solve for x
   x = 35,713,831,732.50/200,684.88
6. Step 6: Final answer
   x = 177,959.75