Finding the Fourth Proportional to 13,080.30, 18,053.41 and 7,774.09

Step by Step Solution

1. Step 1: Write the proportion equation
   13,080.30 : 18,053.41 = 7,774.09 : x
2. Step 2: Convert to fraction form
   13,080.30/18,053.41 = 7,774.09/x
3. Step 3: Cross multiply
   13,080.30x = 18,053.41 × 7,774.09
4. Step 4: Simplify right side
   13,080.30x = 140,348,834.15
5. Step 5: Solve for x
   x = 140,348,834.15/13,080.30
6. Step 6: Final answer
   x = 10,729.79