Finding the Fourth Proportional to 22,470.91, 31,009.63 and 12,399.43

Step by Step Solution

1. Step 1: Write the proportion equation
   22,470.91 : 31,009.63 = 12,399.43 : x
2. Step 2: Convert to fraction form
   22,470.91/31,009.63 = 12,399.43/x
3. Step 3: Cross multiply
   22,470.91x = 31,009.63 × 12,399.43
4. Step 4: Simplify right side
   22,470.91x = 384,501,736.51
5. Step 5: Solve for x
   x = 384,501,736.51/22,470.91
6. Step 6: Final answer
   x = 17,111.09