Finding the Fourth Proportional to 12,394.56, 17,104.32 and 7,680

Step by Step Solution

1. Step 1: Write the proportion equation
   12,394.56 : 17,104.32 = 7,680 : x
2. Step 2: Convert to fraction form
   12,394.56/17,104.32 = 7,680/x
3. Step 3: Cross multiply
   12,394.56x = 17,104.32 × 7,680
4. Step 4: Simplify right side
   12,394.56x = 131,361,177.60
5. Step 5: Solve for x
   x = 131,361,177.60/12,394.56
6. Step 6: Final answer
   x = 10,598.29