Finding the Fourth Proportional to 13,109.60, 18,091.26 and 7,804.59

Step by Step Solution

1. Step 1: Write the proportion equation
   13,109.60 : 18,091.26 = 7,804.59 : x
2. Step 2: Convert to fraction form
   13,109.60/18,091.26 = 7,804.59/x
3. Step 3: Cross multiply
   13,109.60x = 18,091.26 × 7,804.59
4. Step 4: Simplify right side
   13,109.60x = 141,194,866.88
5. Step 5: Solve for x
   x = 141,194,866.88/13,109.60
6. Step 6: Final answer
   x = 10,770.35