Finding the Fourth Proportional to 23,172.09, 31,977.34 and 12,561.69

Step by Step Solution

1. Step 1: Write the proportion equation
   23,172.09 : 31,977.34 = 12,561.69 : x
2. Step 2: Convert to fraction form
   23,172.09/31,977.34 = 12,561.69/x
3. Step 3: Cross multiply
   23,172.09x = 31,977.34 × 12,561.69
4. Step 4: Simplify right side
   23,172.09x = 401,689,432.10
5. Step 5: Solve for x
   x = 401,689,432.10/23,172.09
6. Step 6: Final answer
   x = 17,335.05