Finding the Fourth Proportional to 12,672.33, 17,489.57 and 7,962.99

Step by Step Solution

1. Step 1: Write the proportion equation
   12,672.33 : 17,489.57 = 7,962.99 : x
2. Step 2: Convert to fraction form
   12,672.33/17,489.57 = 7,962.99/x
3. Step 3: Cross multiply
   12,672.33x = 17,489.57 × 7,962.99
4. Step 4: Simplify right side
   12,672.33x = 139,269,231.20
5. Step 5: Solve for x
   x = 139,269,231.20/12,672.33
6. Step 6: Final answer
   x = 10,990.03