Finding the Fourth Proportional to 81,725.98, 122,578.17 and 31,821.34

Step by Step Solution

1. Step 1: Write the proportion equation
   81,725.98 : 122,578.17 = 31,821.34 : x
2. Step 2: Convert to fraction form
   81,725.98/122,578.17 = 31,821.34/x
3. Step 3: Cross multiply
   81,725.98x = 122,578.17 × 31,821.34
4. Step 4: Simplify right side
   81,725.98x = 3,900,601,624.15
5. Step 5: Solve for x
   x = 3,900,601,624.15/81,725.98
6. Step 6: Final answer
   x = 47,727.80