Finding the Fourth Proportional to 13,424.98, 18,526.09 and 7,456.50

Step by Step Solution

1. Step 1: Write the proportion equation
   13,424.98 : 18,526.09 = 7,456.50 : x
2. Step 2: Convert to fraction form
   13,424.98/18,526.09 = 7,456.50/x
3. Step 3: Cross multiply
   13,424.98x = 18,526.09 × 7,456.50
4. Step 4: Simplify right side
   13,424.98x = 138,139,790.09
5. Step 5: Solve for x
   x = 138,139,790.09/13,424.98
6. Step 6: Final answer
   x = 10,289.76