Finding the Fourth Proportional to 12,817.20, 17,687.76 and 7,510.96

Step by Step Solution

1. Step 1: Write the proportion equation
   12,817.20 : 17,687.76 = 7,510.96 : x
2. Step 2: Convert to fraction form
   12,817.20/17,687.76 = 7,510.96/x
3. Step 3: Cross multiply
   12,817.20x = 17,687.76 × 7,510.96
4. Step 4: Simplify right side
   12,817.20x = 132,852,057.85
5. Step 5: Solve for x
   x = 132,852,057.85/12,817.20
6. Step 6: Final answer
   x = 10,365.14