Finding the Fourth Proportional to 13,456.72, 18,573 and 7,869.52

Step by Step Solution

1. Step 1: Write the proportion equation
   13,456.72 : 18,573 = 7,869.52 : x
2. Step 2: Convert to fraction form
   13,456.72/18,573 = 7,869.52/x
3. Step 3: Cross multiply
   13,456.72x = 18,573 × 7,869.52
4. Step 4: Simplify right side
   13,456.72x = 146,160,594.96
5. Step 5: Solve for x
   x = 146,160,594.96/13,456.72
6. Step 6: Final answer
   x = 10,861.53