Finding the Fourth Proportional to 13,240.72, 18,272.55 and 7,273.05

Step by Step Solution

1. Step 1: Write the proportion equation
   13,240.72 : 18,272.55 = 7,273.05 : x
2. Step 2: Convert to fraction form
   13,240.72/18,272.55 = 7,273.05/x
3. Step 3: Cross multiply
   13,240.72x = 18,272.55 × 7,273.05
4. Step 4: Simplify right side
   13,240.72x = 132,897,169.78
5. Step 5: Solve for x
   x = 132,897,169.78/13,240.72
6. Step 6: Final answer
   x = 10,037.00