Finding the Fourth Proportional to 10,809.12, 16,205.77 and 7,290.37

Step by Step Solution

1. Step 1: Write the proportion equation
   10,809.12 : 16,205.77 = 7,290.37 : x
2. Step 2: Convert to fraction form
   10,809.12/16,205.77 = 7,290.37/x
3. Step 3: Cross multiply
   10,809.12x = 16,205.77 × 7,290.37
4. Step 4: Simplify right side
   10,809.12x = 118,146,059.43
5. Step 5: Solve for x
   x = 118,146,059.43/10,809.12
6. Step 6: Final answer
   x = 10,930.22