Finding the Fourth Proportional to 22,471.10, 31,009.58 and 12,399.53

Step by Step Solution

1. Step 1: Write the proportion equation
   22,471.10 : 31,009.58 = 12,399.53 : x
2. Step 2: Convert to fraction form
   22,471.10/31,009.58 = 12,399.53/x
3. Step 3: Cross multiply
   22,471.10x = 31,009.58 × 12,399.53
4. Step 4: Simplify right side
   22,471.10x = 384,504,233.02
5. Step 5: Solve for x
   x = 384,504,233.02/22,471.10
6. Step 6: Final answer
   x = 17,111.06