Finding the Fourth Proportional to 19,839.57, 27,379.82 and 13,113.53

Step by Step Solution

1. Step 1: Write the proportion equation
   19,839.57 : 27,379.82 = 13,113.53 : x
2. Step 2: Convert to fraction form
   19,839.57/27,379.82 = 13,113.53/x
3. Step 3: Cross multiply
   19,839.57x = 27,379.82 × 13,113.53
4. Step 4: Simplify right side
   19,839.57x = 359,046,090.96
5. Step 5: Solve for x
   x = 359,046,090.96/19,839.57
6. Step 6: Final answer
   x = 18,097.47