Finding the Fourth Proportional to 81,846.42, 122,046.82 and 71,891.92

Step by Step Solution

1. Step 1: Write the proportion equation
   81,846.42 : 122,046.82 = 71,891.92 : x
2. Step 2: Convert to fraction form
   81,846.42/122,046.82 = 71,891.92/x
3. Step 3: Cross multiply
   81,846.42x = 122,046.82 × 71,891.92
4. Step 4: Simplify right side
   81,846.42x = 8,774,180,219.69
5. Step 5: Solve for x
   x = 8,774,180,219.69/81,846.42
6. Step 6: Final answer
   x = 107,202.98