Finding the Fourth Proportional to 12,086.70, 18,105.12 and 8,970.24

Step by Step Solution

1. Step 1: Write the proportion equation
   12,086.70 : 18,105.12 = 8,970.24 : x
2. Step 2: Convert to fraction form
   12,086.70/18,105.12 = 8,970.24/x
3. Step 3: Cross multiply
   12,086.70x = 18,105.12 × 8,970.24
4. Step 4: Simplify right side
   12,086.70x = 162,407,271.63
5. Step 5: Solve for x
   x = 162,407,271.63/12,086.70
6. Step 6: Final answer
   x = 13,436.86