Finding the Fourth Proportional to 143,864.75, 198,451.94 and 90,056.31

Step by Step Solution

1. Step 1: Write the proportion equation
   143,864.75 : 198,451.94 = 90,056.31 : x
2. Step 2: Convert to fraction form
   143,864.75/198,451.94 = 90,056.31/x
3. Step 3: Cross multiply
   143,864.75x = 198,451.94 × 90,056.31
4. Step 4: Simplify right side
   143,864.75x = 17,871,848,978.46
5. Step 5: Solve for x
   x = 17,871,848,978.46/143,864.75
6. Step 6: Final answer
   x = 124,226.74