Finding the Fourth Proportional to 12,816.71, 17,687.73 and 7,513.23

Step by Step Solution

1. Step 1: Write the proportion equation
   12,816.71 : 17,687.73 = 7,513.23 : x
2. Step 2: Convert to fraction form
   12,816.71/17,687.73 = 7,513.23/x
3. Step 3: Cross multiply
   12,816.71x = 17,687.73 × 7,513.23
4. Step 4: Simplify right side
   12,816.71x = 132,892,078.17
5. Step 5: Solve for x
   x = 132,892,078.17/12,816.71
6. Step 6: Final answer
   x = 10,368.66