Finding the Fourth Proportional to 81,796.33, 122,670.78 and 31,865.30

Step by Step Solution

1. Step 1: Write the proportion equation
   81,796.33 : 122,670.78 = 31,865.30 : x
2. Step 2: Convert to fraction form
   81,796.33/122,670.78 = 31,865.30/x
3. Step 3: Cross multiply
   81,796.33x = 122,670.78 × 31,865.30
4. Step 4: Simplify right side
   81,796.33x = 3,908,941,205.93
5. Step 5: Solve for x
   x = 3,908,941,205.93/81,796.33
6. Step 6: Final answer
   x = 47,788.71