Finding the Fourth Proportional to 22,470.53, 31,009.49 and 12,399.34

Step by Step Solution

1. Step 1: Write the proportion equation
   22,470.53 : 31,009.49 = 12,399.34 : x
2. Step 2: Convert to fraction form
   22,470.53/31,009.49 = 12,399.34/x
3. Step 3: Cross multiply
   22,470.53x = 31,009.49 × 12,399.34
4. Step 4: Simplify right side
   22,470.53x = 384,497,279.50
5. Step 5: Solve for x
   x = 384,497,279.50/22,470.53
6. Step 6: Final answer
   x = 17,111.18