Finding the Fourth Proportional to 12,969.08, 17,969.60 and 12,688.82

Step by Step Solution

1. Step 1: Write the proportion equation
   12,969.08 : 17,969.60 = 12,688.82 : x
2. Step 2: Convert to fraction form
   12,969.08/17,969.60 = 12,688.82/x
3. Step 3: Cross multiply
   12,969.08x = 17,969.60 × 12,688.82
4. Step 4: Simplify right side
   12,969.08x = 228,012,930.02
5. Step 5: Solve for x
   x = 228,012,930.02/12,969.08
6. Step 6: Final answer
   x = 17,581.28