Finding the Fourth Proportional to 13,507.43, 18,641.18 and 7,540.26

Step by Step Solution

1. Step 1: Write the proportion equation
   13,507.43 : 18,641.18 = 7,540.26 : x
2. Step 2: Convert to fraction form
   13,507.43/18,641.18 = 7,540.26/x
3. Step 3: Cross multiply
   13,507.43x = 18,641.18 × 7,540.26
4. Step 4: Simplify right side
   13,507.43x = 140,559,306.21
5. Step 5: Solve for x
   x = 140,559,306.21/13,507.43
6. Step 6: Final answer
   x = 10,406.08