Finding the Fourth Proportional to 17,390.69, 26,086.31 and 4,243.31

Step by Step Solution

1. Step 1: Write the proportion equation
   17,390.69 : 26,086.31 = 4,243.31 : x
2. Step 2: Convert to fraction form
   17,390.69/26,086.31 = 4,243.31/x
3. Step 3: Cross multiply
   17,390.69x = 26,086.31 × 4,243.31
4. Step 4: Simplify right side
   17,390.69x = 110,692,300.09
5. Step 5: Solve for x
   x = 110,692,300.09/17,390.69
6. Step 6: Final answer
   x = 6,365.03