Finding the Fourth Proportional to 12,672.48, 17,489.52 and 7,082.40

Step by Step Solution

1. Step 1: Write the proportion equation
   12,672.48 : 17,489.52 = 7,082.40 : x
2. Step 2: Convert to fraction form
   12,672.48/17,489.52 = 7,082.40/x
3. Step 3: Cross multiply
   12,672.48x = 17,489.52 × 7,082.40
4. Step 4: Simplify right side
   12,672.48x = 123,867,776.45
5. Step 5: Solve for x
   x = 123,867,776.45/12,672.48
6. Step 6: Final answer
   x = 9,774.55