Finding the Fourth Proportional to 7,210.27, 9,947.86 and 4,226.05

Step by Step Solution

1. Step 1: Write the proportion equation
   7,210.27 : 9,947.86 = 4,226.05 : x
2. Step 2: Convert to fraction form
   7,210.27/9,947.86 = 4,226.05/x
3. Step 3: Cross multiply
   7,210.27x = 9,947.86 × 4,226.05
4. Step 4: Simplify right side
   7,210.27x = 42,040,153.75
5. Step 5: Solve for x
   x = 42,040,153.75/7,210.27
6. Step 6: Final answer
   x = 5,830.59