Finding the Fourth Proportional to 12,689.63, 17,511.44 and 7,024.38

Step by Step Solution

1. Step 1: Write the proportion equation
   12,689.63 : 17,511.44 = 7,024.38 : x
2. Step 2: Convert to fraction form
   12,689.63/17,511.44 = 7,024.38/x
3. Step 3: Cross multiply
   12,689.63x = 17,511.44 × 7,024.38
4. Step 4: Simplify right side
   12,689.63x = 123,006,937.72
5. Step 5: Solve for x
   x = 123,006,937.72/12,689.63
6. Step 6: Final answer
   x = 9,693.50