Finding the Fourth Proportional to 22,470.53, 31,009.10 and 12,399.17

Step by Step Solution

1. Step 1: Write the proportion equation
   22,470.53 : 31,009.10 = 12,399.17 : x
2. Step 2: Convert to fraction form
   22,470.53/31,009.10 = 12,399.17/x
3. Step 3: Cross multiply
   22,470.53x = 31,009.10 × 12,399.17
4. Step 4: Simplify right side
   22,470.53x = 384,486,885.41
5. Step 5: Solve for x
   x = 384,486,885.41/22,470.53
6. Step 6: Final answer
   x = 17,110.72