Finding the Fourth Proportional to 12,099, 16,679.34 and 8,570.28

Step by Step Solution

1. Step 1: Write the proportion equation
   12,099 : 16,679.34 = 8,570.28 : x
2. Step 2: Convert to fraction form
   12,099/16,679.34 = 8,570.28/x
3. Step 3: Cross multiply
   12,099x = 16,679.34 × 8,570.28
4. Step 4: Simplify right side
   12,099x = 142,946,614.02
5. Step 5: Solve for x
   x = 142,946,614.02/12,099
6. Step 6: Final answer
   x = 11,814.75