Finding the Fourth Proportional to 23,172.31, 31,977.91 and 12,561.92

Step by Step Solution

1. Step 1: Write the proportion equation
   23,172.31 : 31,977.91 = 12,561.92 : x
2. Step 2: Convert to fraction form
   23,172.31/31,977.91 = 12,561.92/x
3. Step 3: Cross multiply
   23,172.31x = 31,977.91 × 12,561.92
4. Step 4: Simplify right side
   23,172.31x = 401,703,947.19
5. Step 5: Solve for x
   x = 401,703,947.19/23,172.31
6. Step 6: Final answer
   x = 17,335.52