Finding the Fourth Proportional to 23,171.97, 31,977.54 and 12,561.78

Step by Step Solution

1. Step 1: Write the proportion equation
   23,171.97 : 31,977.54 = 12,561.78 : x
2. Step 2: Convert to fraction form
   23,171.97/31,977.54 = 12,561.78/x
3. Step 3: Cross multiply
   23,171.97x = 31,977.54 × 12,561.78
4. Step 4: Simplify right side
   23,171.97x = 401,694,822.42
5. Step 5: Solve for x
   x = 401,694,822.42/23,171.97
6. Step 6: Final answer
   x = 17,335.38