Finding the Fourth Proportional to 12,856.70, 19,287.89 and 5,467.47

Step by Step Solution

1. Step 1: Write the proportion equation
   12,856.70 : 19,287.89 = 5,467.47 : x
2. Step 2: Convert to fraction form
   12,856.70/19,287.89 = 5,467.47/x
3. Step 3: Cross multiply
   12,856.70x = 19,287.89 × 5,467.47
4. Step 4: Simplify right side
   12,856.70x = 105,455,932.60
5. Step 5: Solve for x
   x = 105,455,932.60/12,856.70
6. Step 6: Final answer
   x = 8,202.41