Finding the Fourth Proportional to 281,939.94, 422,769.98 and 89,789.31

Step by Step Solution

1. Step 1: Write the proportion equation
   281,939.94 : 422,769.98 = 89,789.31 : x
2. Step 2: Convert to fraction form
   281,939.94/422,769.98 = 89,789.31/x
3. Step 3: Cross multiply
   281,939.94x = 422,769.98 × 89,789.31
4. Step 4: Simplify right side
   281,939.94x = 37,960,225,017.39
5. Step 5: Solve for x
   x = 37,960,225,017.39/281,939.94
6. Step 6: Final answer
   x = 134,639.40