Finding the Fourth Proportional to 81,793.56, 122,704.56 and 31,900.80

Step by Step Solution

1. Step 1: Write the proportion equation
   81,793.56 : 122,704.56 = 31,900.80 : x
2. Step 2: Convert to fraction form
   81,793.56/122,704.56 = 31,900.80/x
3. Step 3: Cross multiply
   81,793.56x = 122,704.56 × 31,900.80
4. Step 4: Simplify right side
   81,793.56x = 3,914,373,627.65
5. Step 5: Solve for x
   x = 3,914,373,627.65/81,793.56
6. Step 6: Final answer
   x = 47,856.75