Finding the Fourth Proportional to 12,689.47, 17,511.02 and 7,024.23

Step by Step Solution

1. Step 1: Write the proportion equation
   12,689.47 : 17,511.02 = 7,024.23 : x
2. Step 2: Convert to fraction form
   12,689.47/17,511.02 = 7,024.23/x
3. Step 3: Cross multiply
   12,689.47x = 17,511.02 × 7,024.23
4. Step 4: Simplify right side
   12,689.47x = 123,001,396.89
5. Step 5: Solve for x
   x = 123,001,396.89/12,689.47
6. Step 6: Final answer
   x = 9,693.19