Finding the Fourth Proportional to 81,724.98, 122,576.67 and 31,820.34

Step by Step Solution

1. Step 1: Write the proportion equation
   81,724.98 : 122,576.67 = 31,820.34 : x
2. Step 2: Convert to fraction form
   81,724.98/122,576.67 = 31,820.34/x
3. Step 3: Cross multiply
   81,724.98x = 122,576.67 × 31,820.34
4. Step 4: Simplify right side
   81,724.98x = 3,900,431,315.47
5. Step 5: Solve for x
   x = 3,900,431,315.47/81,724.98
6. Step 6: Final answer
   x = 47,726.30