Finding the Fourth Proportional to 13,424.28, 18,526.61 and 7,456.32

Step by Step Solution

1. Step 1: Write the proportion equation
   13,424.28 : 18,526.61 = 7,456.32 : x
2. Step 2: Convert to fraction form
   13,424.28/18,526.61 = 7,456.32/x
3. Step 3: Cross multiply
   13,424.28x = 18,526.61 × 7,456.32
4. Step 4: Simplify right side
   13,424.28x = 138,140,202.76
5. Step 5: Solve for x
   x = 138,140,202.76/13,424.28
6. Step 6: Final answer
   x = 10,290.33