Finding the Fourth Proportional to 13,240.42, 18,271.93 and 7,271.98

Step by Step Solution

1. Step 1: Write the proportion equation
   13,240.42 : 18,271.93 = 7,271.98 : x
2. Step 2: Convert to fraction form
   13,240.42/18,271.93 = 7,271.98/x
3. Step 3: Cross multiply
   13,240.42x = 18,271.93 × 7,271.98
4. Step 4: Simplify right side
   13,240.42x = 132,873,109.52
5. Step 5: Solve for x
   x = 132,873,109.52/13,240.42
6. Step 6: Final answer
   x = 10,035.42