Finding the Fourth Proportional to 23,019.12, 31,758.48 and 12,945.84

Step by Step Solution

1. Step 1: Write the proportion equation
   23,019.12 : 31,758.48 = 12,945.84 : x
2. Step 2: Convert to fraction form
   23,019.12/31,758.48 = 12,945.84/x
3. Step 3: Cross multiply
   23,019.12x = 31,758.48 × 12,945.84
4. Step 4: Simplify right side
   23,019.12x = 411,140,200.72
5. Step 5: Solve for x
   x = 411,140,200.72/23,019.12
6. Step 6: Final answer
   x = 17,860.81