Finding the Fourth Proportional to 13,219.78, 18,243.69 and 7,251.82

Step by Step Solution

1. Step 1: Write the proportion equation
   13,219.78 : 18,243.69 = 7,251.82 : x
2. Step 2: Convert to fraction form
   13,219.78/18,243.69 = 7,251.82/x
3. Step 3: Cross multiply
   13,219.78x = 18,243.69 × 7,251.82
4. Step 4: Simplify right side
   13,219.78x = 132,299,956.02
5. Step 5: Solve for x
   x = 132,299,956.02/13,219.78
6. Step 6: Final answer
   x = 10,007.73