Finding the Fourth Proportional to 12,835.28, 17,705.04 and 8,856.20

Step by Step Solution

1. Step 1: Write the proportion equation
   12,835.28 : 17,705.04 = 8,856.20 : x
2. Step 2: Convert to fraction form
   12,835.28/17,705.04 = 8,856.20/x
3. Step 3: Cross multiply
   12,835.28x = 17,705.04 × 8,856.20
4. Step 4: Simplify right side
   12,835.28x = 156,799,375.25
5. Step 5: Solve for x
   x = 156,799,375.25/12,835.28
6. Step 6: Final answer
   x = 12,216.28