Finding the Fourth Proportional to 22,471.15, 31,010.16 and 12,399.59

Step by Step Solution

1. Step 1: Write the proportion equation
   22,471.15 : 31,010.16 = 12,399.59 : x
2. Step 2: Convert to fraction form
   22,471.15/31,010.16 = 12,399.59/x
3. Step 3: Cross multiply
   22,471.15x = 31,010.16 × 12,399.59
4. Step 4: Simplify right side
   22,471.15x = 384,513,052.79
5. Step 5: Solve for x
   x = 384,513,052.79/22,471.15
6. Step 6: Final answer
   x = 17,111.41