Finding the Fourth Proportional to 12,689.36, 17,511.34 and 7,024.50

Step by Step Solution

1. Step 1: Write the proportion equation
   12,689.36 : 17,511.34 = 7,024.50 : x
2. Step 2: Convert to fraction form
   12,689.36/17,511.34 = 7,024.50/x
3. Step 3: Cross multiply
   12,689.36x = 17,511.34 × 7,024.50
4. Step 4: Simplify right side
   12,689.36x = 123,008,407.83
5. Step 5: Solve for x
   x = 123,008,407.83/12,689.36
6. Step 6: Final answer
   x = 9,693.82