Finding the Fourth Proportional to 22,471.42, 31,010.32 and 12,399.94

Step by Step Solution

1. Step 1: Write the proportion equation
   22,471.42 : 31,010.32 = 12,399.94 : x
2. Step 2: Convert to fraction form
   22,471.42/31,010.32 = 12,399.94/x
3. Step 3: Cross multiply
   22,471.42x = 31,010.32 × 12,399.94
4. Step 4: Simplify right side
   22,471.42x = 384,526,107.38
5. Step 5: Solve for x
   x = 384,526,107.38/22,471.42
6. Step 6: Final answer
   x = 17,111.78