Finding the Fourth Proportional to 12,796.28, 17,658.90 and 7,489.76

Step by Step Solution

1. Step 1: Write the proportion equation
   12,796.28 : 17,658.90 = 7,489.76 : x
2. Step 2: Convert to fraction form
   12,796.28/17,658.90 = 7,489.76/x
3. Step 3: Cross multiply
   12,796.28x = 17,658.90 × 7,489.76
4. Step 4: Simplify right side
   12,796.28x = 132,260,885.42
5. Step 5: Solve for x
   x = 132,260,885.42/12,796.28
6. Step 6: Final answer
   x = 10,335.89