Finding the Fourth Proportional to 19,853.55, 27,399.30 and 13,127.49

Step by Step Solution

1. Step 1: Write the proportion equation
   19,853.55 : 27,399.30 = 13,127.49 : x
2. Step 2: Convert to fraction form
   19,853.55/27,399.30 = 13,127.49/x
3. Step 3: Cross multiply
   19,853.55x = 27,399.30 × 13,127.49
4. Step 4: Simplify right side
   19,853.55x = 359,684,036.76
5. Step 5: Solve for x
   x = 359,684,036.76/19,853.55
6. Step 6: Final answer
   x = 18,116.86