Finding the Fourth Proportional to 13,109.10, 18,090.57 and 7,804.09

Step by Step Solution

1. Step 1: Write the proportion equation
   13,109.10 : 18,090.57 = 7,804.09 : x
2. Step 2: Convert to fraction form
   13,109.10/18,090.57 = 7,804.09/x
3. Step 3: Cross multiply
   13,109.10x = 18,090.57 × 7,804.09
4. Step 4: Simplify right side
   13,109.10x = 141,180,436.43
5. Step 5: Solve for x
   x = 141,180,436.43/13,109.10
6. Step 6: Final answer
   x = 10,769.65