Finding the Fourth Proportional to 81,808.45, 122,662.41 and 31,830.34

Step by Step Solution

1. Step 1: Write the proportion equation
   81,808.45 : 122,662.41 = 31,830.34 : x
2. Step 2: Convert to fraction form
   81,808.45/122,662.41 = 31,830.34/x
3. Step 3: Cross multiply
   81,808.45x = 122,662.41 × 31,830.34
4. Step 4: Simplify right side
   81,808.45x = 3,904,386,215.52
5. Step 5: Solve for x
   x = 3,904,386,215.52/81,808.45
6. Step 6: Final answer
   x = 47,725.95