Finding the Fourth Proportional to 12,696.94, 17,520.90 and 7,031.28

Step by Step Solution

1. Step 1: Write the proportion equation
   12,696.94 : 17,520.90 = 7,031.28 : x
2. Step 2: Convert to fraction form
   12,696.94/17,520.90 = 7,031.28/x
3. Step 3: Cross multiply
   12,696.94x = 17,520.90 × 7,031.28
4. Step 4: Simplify right side
   12,696.94x = 123,194,353.75
5. Step 5: Solve for x
   x = 123,194,353.75/12,696.94
6. Step 6: Final answer
   x = 9,702.68