Finding the Fourth Proportional to 12,689.31, 17,511.29 and 7,024.45

Step by Step Solution

1. Step 1: Write the proportion equation
   12,689.31 : 17,511.29 = 7,024.45 : x
2. Step 2: Convert to fraction form
   12,689.31/17,511.29 = 7,024.45/x
3. Step 3: Cross multiply
   12,689.31x = 17,511.29 × 7,024.45
4. Step 4: Simplify right side
   12,689.31x = 123,007,181.04
5. Step 5: Solve for x
   x = 123,007,181.04/12,689.31
6. Step 6: Final answer
   x = 9,693.76