Finding the Fourth Proportional to 11,605.55, 16,016.60 and 9,713.79

Step by Step Solution

1. Step 1: Write the proportion equation
   11,605.55 : 16,016.60 = 9,713.79 : x
2. Step 2: Convert to fraction form
   11,605.55/16,016.60 = 9,713.79/x
3. Step 3: Cross multiply
   11,605.55x = 16,016.60 × 9,713.79
4. Step 4: Simplify right side
   11,605.55x = 155,581,913.20
5. Step 5: Solve for x
   x = 155,581,913.20/11,605.55
6. Step 6: Final answer
   x = 13,405.83