Finding the Fourth Proportional to 22,468.69, 31,009.53 and 12,908.56

Step by Step Solution

1. Step 1: Write the proportion equation
   22,468.69 : 31,009.53 = 12,908.56 : x
2. Step 2: Convert to fraction form
   22,468.69/31,009.53 = 12,908.56/x
3. Step 3: Cross multiply
   22,468.69x = 31,009.53 × 12,908.56
4. Step 4: Simplify right side
   22,468.69x = 400,288,320.39
5. Step 5: Solve for x
   x = 400,288,320.39/22,468.69
6. Step 6: Final answer
   x = 17,815.38