Finding the Fourth Proportional to 13,240.34, 18,271.55 and 7,272.10

Step by Step Solution

1. Step 1: Write the proportion equation
   13,240.34 : 18,271.55 = 7,272.10 : x
2. Step 2: Convert to fraction form
   13,240.34/18,271.55 = 7,272.10/x
3. Step 3: Cross multiply
   13,240.34x = 18,271.55 × 7,272.10
4. Step 4: Simplify right side
   13,240.34x = 132,872,538.76
5. Step 5: Solve for x
   x = 132,872,538.76/13,240.34
6. Step 6: Final answer
   x = 10,035.43