Finding the Fourth Proportional to 23,017.57, 31,765.40 and 12,949.18

Step by Step Solution

1. Step 1: Write the proportion equation
   23,017.57 : 31,765.40 = 12,949.18 : x
2. Step 2: Convert to fraction form
   23,017.57/31,765.40 = 12,949.18/x
3. Step 3: Cross multiply
   23,017.57x = 31,765.40 × 12,949.18
4. Step 4: Simplify right side
   23,017.57x = 411,335,882.37
5. Step 5: Solve for x
   x = 411,335,882.37/23,017.57
6. Step 6: Final answer
   x = 17,870.52