Finding the Fourth Proportional to 5,426.70, 8,091.39 and 5,328.28

Step by Step Solution

1. Step 1: Write the proportion equation
   5,426.70 : 8,091.39 = 5,328.28 : x
2. Step 2: Convert to fraction form
   5,426.70/8,091.39 = 5,328.28/x
3. Step 3: Cross multiply
   5,426.70x = 8,091.39 × 5,328.28
4. Step 4: Simplify right side
   5,426.70x = 43,113,221.60
5. Step 5: Solve for x
   x = 43,113,221.60/5,426.70
6. Step 6: Final answer
   x = 7,944.65