Finding the Fourth Proportional to 10,784.34, 16,179.20 and 8,571.53

Step by Step Solution

1. Step 1: Write the proportion equation
   10,784.34 : 16,179.20 = 8,571.53 : x
2. Step 2: Convert to fraction form
   10,784.34/16,179.20 = 8,571.53/x
3. Step 3: Cross multiply
   10,784.34x = 16,179.20 × 8,571.53
4. Step 4: Simplify right side
   10,784.34x = 138,680,417.28
5. Step 5: Solve for x
   x = 138,680,417.28/10,784.34
6. Step 6: Final answer
   x = 12,859.42