Finding the Fourth Proportional to 12,696.63, 17,520.90 and 7,031.62

Step by Step Solution

1. Step 1: Write the proportion equation
   12,696.63 : 17,520.90 = 7,031.62 : x
2. Step 2: Convert to fraction form
   12,696.63/17,520.90 = 7,031.62/x
3. Step 3: Cross multiply
   12,696.63x = 17,520.90 × 7,031.62
4. Step 4: Simplify right side
   12,696.63x = 123,200,310.86
5. Step 5: Solve for x
   x = 123,200,310.86/12,696.63
6. Step 6: Final answer
   x = 9,703.39