Finding the Fourth Proportional to 143,832.11, 198,359.42 and 90,123.03

Step by Step Solution

1. Step 1: Write the proportion equation
   143,832.11 : 198,359.42 = 90,123.03 : x
2. Step 2: Convert to fraction form
   143,832.11/198,359.42 = 90,123.03/x
3. Step 3: Cross multiply
   143,832.11x = 198,359.42 × 90,123.03
4. Step 4: Simplify right side
   143,832.11x = 17,876,751,508.83
5. Step 5: Solve for x
   x = 17,876,751,508.83/143,832.11
6. Step 6: Final answer
   x = 124,289.02