Finding the Fourth Proportional to 12,689.76, 17,511.61 and 7,024.50

Step by Step Solution

1. Step 1: Write the proportion equation
   12,689.76 : 17,511.61 = 7,024.50 : x
2. Step 2: Convert to fraction form
   12,689.76/17,511.61 = 7,024.50/x
3. Step 3: Cross multiply
   12,689.76x = 17,511.61 × 7,024.50
4. Step 4: Simplify right side
   12,689.76x = 123,010,280.30
5. Step 5: Solve for x
   x = 123,010,280.30/12,689.76
6. Step 6: Final answer
   x = 9,693.67