Finding the Fourth Proportional to 19,439.56, 29,162.76 and 12,871.12

Step by Step Solution

1. Step 1: Write the proportion equation
   19,439.56 : 29,162.76 = 12,871.12 : x
2. Step 2: Convert to fraction form
   19,439.56/29,162.76 = 12,871.12/x
3. Step 3: Cross multiply
   19,439.56x = 29,162.76 × 12,871.12
4. Step 4: Simplify right side
   19,439.56x = 375,357,383.49
5. Step 5: Solve for x
   x = 375,357,383.49/19,439.56
6. Step 6: Final answer
   x = 19,308.94