Finding the Fourth Proportional to 13,109.34, 18,091.26 and 7,520.34

Step by Step Solution

1. Step 1: Write the proportion equation
   13,109.34 : 18,091.26 = 7,520.34 : x
2. Step 2: Convert to fraction form
   13,109.34/18,091.26 = 7,520.34/x
3. Step 3: Cross multiply
   13,109.34x = 18,091.26 × 7,520.34
4. Step 4: Simplify right side
   13,109.34x = 136,052,426.23
5. Step 5: Solve for x
   x = 136,052,426.23/13,109.34
6. Step 6: Final answer
   x = 10,378.28