Finding the Fourth Proportional to 81,490.76, 122,141.54 and 30,857.59

Step by Step Solution

1. Step 1: Write the proportion equation
   81,490.76 : 122,141.54 = 30,857.59 : x
2. Step 2: Convert to fraction form
   81,490.76/122,141.54 = 30,857.59/x
3. Step 3: Cross multiply
   81,490.76x = 122,141.54 × 30,857.59
4. Step 4: Simplify right side
   81,490.76x = 3,768,993,563.29
5. Step 5: Solve for x
   x = 3,768,993,563.29/81,490.76
6. Step 6: Final answer
   x = 46,250.56