Finding the Fourth Proportional to 8,456.28, 11,672.34 and 5,807.40

Step by Step Solution

1. Step 1: Write the proportion equation
   8,456.28 : 11,672.34 = 5,807.40 : x
2. Step 2: Convert to fraction form
   8,456.28/11,672.34 = 5,807.40/x
3. Step 3: Cross multiply
   8,456.28x = 11,672.34 × 5,807.40
4. Step 4: Simplify right side
   8,456.28x = 67,785,947.32
5. Step 5: Solve for x
   x = 67,785,947.32/8,456.28
6. Step 6: Final answer
   x = 8,016.05