Finding the Fourth Proportional to 12,689.89, 17,511.83 and 7,024.51

Step by Step Solution

1. Step 1: Write the proportion equation
   12,689.89 : 17,511.83 = 7,024.51 : x
2. Step 2: Convert to fraction form
   12,689.89/17,511.83 = 7,024.51/x
3. Step 3: Cross multiply
   12,689.89x = 17,511.83 × 7,024.51
4. Step 4: Simplify right side
   12,689.89x = 123,012,102.13
5. Step 5: Solve for x
   x = 123,012,102.13/12,689.89
6. Step 6: Final answer
   x = 9,693.71