Finding the Fourth Proportional to 23,172.19, 31,977.33 and 12,561.59

Step by Step Solution

1. Step 1: Write the proportion equation
   23,172.19 : 31,977.33 = 12,561.59 : x
2. Step 2: Convert to fraction form
   23,172.19/31,977.33 = 12,561.59/x
3. Step 3: Cross multiply
   23,172.19x = 31,977.33 × 12,561.59
4. Step 4: Simplify right side
   23,172.19x = 401,686,108.75
5. Step 5: Solve for x
   x = 401,686,108.75/23,172.19
6. Step 6: Final answer
   x = 17,334.84