Finding the Fourth Proportional to 143,357.98, 197,864.12 and 90,936.05

Step by Step Solution

1. Step 1: Write the proportion equation
   143,357.98 : 197,864.12 = 90,936.05 : x
2. Step 2: Convert to fraction form
   143,357.98/197,864.12 = 90,936.05/x
3. Step 3: Cross multiply
   143,357.98x = 197,864.12 × 90,936.05
4. Step 4: Simplify right side
   143,357.98x = 17,992,981,034.86
5. Step 5: Solve for x
   x = 17,992,981,034.86/143,357.98
6. Step 6: Final answer
   x = 125,510.84