Finding the Fourth Proportional to 19,819.69, 29,670.91 and 17,359.31

Step by Step Solution

1. Step 1: Write the proportion equation
   19,819.69 : 29,670.91 = 17,359.31 : x
2. Step 2: Convert to fraction form
   19,819.69/29,670.91 = 17,359.31/x
3. Step 3: Cross multiply
   19,819.69x = 29,670.91 × 17,359.31
4. Step 4: Simplify right side
   19,819.69x = 515,066,555.45
5. Step 5: Solve for x
   x = 515,066,555.45/19,819.69
6. Step 6: Final answer
   x = 25,987.62