Finding the Fourth Proportional to 12,692.47, 17,517.69 and 8,710.31

Step by Step Solution

1. Step 1: Write the proportion equation
   12,692.47 : 17,517.69 = 8,710.31 : x
2. Step 2: Convert to fraction form
   12,692.47/17,517.69 = 8,710.31/x
3. Step 3: Cross multiply
   12,692.47x = 17,517.69 × 8,710.31
4. Step 4: Simplify right side
   12,692.47x = 152,584,510.38
5. Step 5: Solve for x
   x = 152,584,510.38/12,692.47
6. Step 6: Final answer
   x = 12,021.66