Finding the Fourth Proportional to 23,020.30, 31,770.82 and 12,949.16

Step by Step Solution

1. Step 1: Write the proportion equation
   23,020.30 : 31,770.82 = 12,949.16 : x
2. Step 2: Convert to fraction form
   23,020.30/31,770.82 = 12,949.16/x
3. Step 3: Cross multiply
   23,020.30x = 31,770.82 × 12,949.16
4. Step 4: Simplify right side
   23,020.30x = 411,405,366.77
5. Step 5: Solve for x
   x = 411,405,366.77/23,020.30
6. Step 6: Final answer
   x = 17,871.42