Finding the Fourth Proportional to 81,857.69, 122,786.58 and 25,697.55

Step by Step Solution

1. Step 1: Write the proportion equation
   81,857.69 : 122,786.58 = 25,697.55 : x
2. Step 2: Convert to fraction form
   81,857.69/122,786.58 = 25,697.55/x
3. Step 3: Cross multiply
   81,857.69x = 122,786.58 × 25,697.55
4. Step 4: Simplify right side
   81,857.69x = 3,155,314,835.69
5. Step 5: Solve for x
   x = 3,155,314,835.69/81,857.69
6. Step 6: Final answer
   x = 38,546.35