Finding the Fourth Proportional to 81,881.91, 122,796.72 and 31,949.85

Step by Step Solution

1. Step 1: Write the proportion equation
   81,881.91 : 122,796.72 = 31,949.85 : x
2. Step 2: Convert to fraction form
   81,881.91/122,796.72 = 31,949.85/x
3. Step 3: Cross multiply
   81,881.91x = 122,796.72 × 31,949.85
4. Step 4: Simplify right side
   81,881.91x = 3,923,336,784.49
5. Step 5: Solve for x
   x = 3,923,336,784.49/81,881.91
6. Step 6: Final answer
   x = 47,914.57