Finding the Fourth Proportional to 12,971.92, 17,894.72 and 8,503.20

Step by Step Solution

1. Step 1: Write the proportion equation
   12,971.92 : 17,894.72 = 8,503.20 : x
2. Step 2: Convert to fraction form
   12,971.92/17,894.72 = 8,503.20/x
3. Step 3: Cross multiply
   12,971.92x = 17,894.72 × 8,503.20
4. Step 4: Simplify right side
   12,971.92x = 152,162,383.10
5. Step 5: Solve for x
   x = 152,162,383.10/12,971.92
6. Step 6: Final answer
   x = 11,730.14