Finding the Fourth Proportional to 23,058.48, 31,821.44 and 13,499.31

Step by Step Solution

1. Step 1: Write the proportion equation
   23,058.48 : 31,821.44 = 13,499.31 : x
2. Step 2: Convert to fraction form
   23,058.48/31,821.44 = 13,499.31/x
3. Step 3: Cross multiply
   23,058.48x = 31,821.44 × 13,499.31
4. Step 4: Simplify right side
   23,058.48x = 429,567,415.71
5. Step 5: Solve for x
   x = 429,567,415.71/23,058.48
6. Step 6: Final answer
   x = 18,629.48