Finding the Fourth Proportional to 55,729.18, 83,592.42 and 13,609.54

Step by Step Solution

1. Step 1: Write the proportion equation
   55,729.18 : 83,592.42 = 13,609.54 : x
2. Step 2: Convert to fraction form
   55,729.18/83,592.42 = 13,609.54/x
3. Step 3: Cross multiply
   55,729.18x = 83,592.42 × 13,609.54
4. Step 4: Simplify right side
   55,729.18x = 1,137,654,383.69
5. Step 5: Solve for x
   x = 1,137,654,383.69/55,729.18
6. Step 6: Final answer
   x = 20,413.98