Finding the Fourth Proportional to 81,859.69, 122,789.58 and 25,699.55

Step by Step Solution

1. Step 1: Write the proportion equation
   81,859.69 : 122,789.58 = 25,699.55 : x
2. Step 2: Convert to fraction form
   81,859.69/122,789.58 = 25,699.55/x
3. Step 3: Cross multiply
   81,859.69x = 122,789.58 × 25,699.55
4. Step 4: Simplify right side
   81,859.69x = 3,155,636,950.69
5. Step 5: Solve for x
   x = 3,155,636,950.69/81,859.69
6. Step 6: Final answer
   x = 38,549.34