Finding the Fourth Proportional to 12,864.83, 19,306.48 and 5,474.49

Step by Step Solution

1. Step 1: Write the proportion equation
   12,864.83 : 19,306.48 = 5,474.49 : x
2. Step 2: Convert to fraction form
   12,864.83/19,306.48 = 5,474.49/x
3. Step 3: Cross multiply
   12,864.83x = 19,306.48 × 5,474.49
4. Step 4: Simplify right side
   12,864.83x = 105,693,040.48
5. Step 5: Solve for x
   x = 105,693,040.48/12,864.83
6. Step 6: Final answer
   x = 8,215.66