Finding the Fourth Proportional to 200,411.51, 276,434.82 and 128,882.03

Step by Step Solution

1. Step 1: Write the proportion equation
   200,411.51 : 276,434.82 = 128,882.03 : x
2. Step 2: Convert to fraction form
   200,411.51/276,434.82 = 128,882.03/x
3. Step 3: Cross multiply
   200,411.51x = 276,434.82 × 128,882.03
4. Step 4: Simplify right side
   200,411.51x = 35,627,479,382.11
5. Step 5: Solve for x
   x = 35,627,479,382.11/200,411.51
6. Step 6: Final answer
   x = 177,771.63