Finding the Fourth Proportional to 13,240.27, 18,271.90 and 7,272.50

Step by Step Solution

1. Step 1: Write the proportion equation
   13,240.27 : 18,271.90 = 7,272.50 : x
2. Step 2: Convert to fraction form
   13,240.27/18,271.90 = 7,272.50/x
3. Step 3: Cross multiply
   13,240.27x = 18,271.90 × 7,272.50
4. Step 4: Simplify right side
   13,240.27x = 132,882,301.39
5. Step 5: Solve for x
   x = 132,882,301.39/13,240.27
6. Step 6: Final answer
   x = 10,036.23