Finding the Fourth Proportional to 268,146.78, 401,607.81 and 128,003.82

Step by Step Solution

1. Step 1: Write the proportion equation
   268,146.78 : 401,607.81 = 128,003.82 : x
2. Step 2: Convert to fraction form
   268,146.78/401,607.81 = 128,003.82/x
3. Step 3: Cross multiply
   268,146.78x = 401,607.81 × 128,003.82
4. Step 4: Simplify right side
   268,146.78x = 51,407,333,821.83
5. Step 5: Solve for x
   x = 51,407,333,821.83/268,146.78
6. Step 6: Final answer
   x = 191,713.41