Finding the Fourth Proportional to 200,081.93, 276,149.99 and 128,551.37

Step by Step Solution

1. Step 1: Write the proportion equation
   200,081.93 : 276,149.99 = 128,551.37 : x
2. Step 2: Convert to fraction form
   200,081.93/276,149.99 = 128,551.37/x
3. Step 3: Cross multiply
   200,081.93x = 276,149.99 × 128,551.37
4. Step 4: Simplify right side
   200,081.93x = 35,499,458,480.61
5. Step 5: Solve for x
   x = 35,499,458,480.61/200,081.93
6. Step 6: Final answer
   x = 177,424.61