Finding the Fourth Proportional to 15,162.99, 22,664.37 and 13,172.82

Step by Step Solution

1. Step 1: Write the proportion equation
   15,162.99 : 22,664.37 = 13,172.82 : x
2. Step 2: Convert to fraction form
   15,162.99/22,664.37 = 13,172.82/x
3. Step 3: Cross multiply
   15,162.99x = 22,664.37 × 13,172.82
4. Step 4: Simplify right side
   15,162.99x = 298,553,666.42
5. Step 5: Solve for x
   x = 298,553,666.42/15,162.99
6. Step 6: Final answer
   x = 19,689.63