Finding the Fourth Proportional to 7,208.91, 9,947.52 and 4,224.15

Step by Step Solution

1. Step 1: Write the proportion equation
   7,208.91 : 9,947.52 = 4,224.15 : x
2. Step 2: Convert to fraction form
   7,208.91/9,947.52 = 4,224.15/x
3. Step 3: Cross multiply
   7,208.91x = 9,947.52 × 4,224.15
4. Step 4: Simplify right side
   7,208.91x = 42,019,816.61
5. Step 5: Solve for x
   x = 42,019,816.61/7,208.91
6. Step 6: Final answer
   x = 5,828.87