Finding the Fourth Proportional to 281,401.30, 422,123.91 and 81,724.96

Step by Step Solution

1. Step 1: Write the proportion equation
   281,401.30 : 422,123.91 = 81,724.96 : x
2. Step 2: Convert to fraction form
   281,401.30/422,123.91 = 81,724.96/x
3. Step 3: Cross multiply
   281,401.30x = 422,123.91 × 81,724.96
4. Step 4: Simplify right side
   281,401.30x = 34,498,059,659.79
5. Step 5: Solve for x
   x = 34,498,059,659.79/281,401.30
6. Step 6: Final answer
   x = 122,593.82