Finding the Fourth Proportional to 11,647.80, 16,059.06 and 7,662.60

Step by Step Solution

1. Step 1: Write the proportion equation
   11,647.80 : 16,059.06 = 7,662.60 : x
2. Step 2: Convert to fraction form
   11,647.80/16,059.06 = 7,662.60/x
3. Step 3: Cross multiply
   11,647.80x = 16,059.06 × 7,662.60
4. Step 4: Simplify right side
   11,647.80x = 123,054,153.16
5. Step 5: Solve for x
   x = 123,054,153.16/11,647.80
6. Step 6: Final answer
   x = 10,564.58