Finding the Fourth Proportional to 12,692.69, 17,513.48 and 8,215.82

Step by Step Solution

1. Step 1: Write the proportion equation
   12,692.69 : 17,513.48 = 8,215.82 : x
2. Step 2: Convert to fraction form
   12,692.69/17,513.48 = 8,215.82/x
3. Step 3: Cross multiply
   12,692.69x = 17,513.48 × 8,215.82
4. Step 4: Simplify right side
   12,692.69x = 143,887,599.25
5. Step 5: Solve for x
   x = 143,887,599.25/12,692.69
6. Step 6: Final answer
   x = 11,336.26