Finding the Fourth Proportional to 12,902.91, 17,816.55 and 10,513.23

Step by Step Solution

1. Step 1: Write the proportion equation
   12,902.91 : 17,816.55 = 10,513.23 : x
2. Step 2: Convert to fraction form
   12,902.91/17,816.55 = 10,513.23/x
3. Step 3: Cross multiply
   12,902.91x = 17,816.55 × 10,513.23
4. Step 4: Simplify right side
   12,902.91x = 187,309,487.96
5. Step 5: Solve for x
   x = 187,309,487.96/12,902.91
6. Step 6: Final answer
   x = 14,516.84