Finding the Fourth Proportional to 235,493.78, 324,983.72 and 128,066.12

Step by Step Solution

1. Step 1: Write the proportion equation
   235,493.78 : 324,983.72 = 128,066.12 : x
2. Step 2: Convert to fraction form
   235,493.78/324,983.72 = 128,066.12/x
3. Step 3: Cross multiply
   235,493.78x = 324,983.72 × 128,066.12
4. Step 4: Simplify right side
   235,493.78x = 41,619,404,083.57
5. Step 5: Solve for x
   x = 41,619,404,083.57/235,493.78
6. Step 6: Final answer
   x = 176,732.50