Finding the Fourth Proportional to 13,424.50, 18,526.06 and 7,456.72

Step by Step Solution

1. Step 1: Write the proportion equation
   13,424.50 : 18,526.06 = 7,456.72 : x
2. Step 2: Convert to fraction form
   13,424.50/18,526.06 = 7,456.72/x
3. Step 3: Cross multiply
   13,424.50x = 18,526.06 × 7,456.72
4. Step 4: Simplify right side
   13,424.50x = 138,143,642.12
5. Step 5: Solve for x
   x = 138,143,642.12/13,424.50
6. Step 6: Final answer
   x = 10,290.41