Finding the Fourth Proportional to 7,218.73, 9,959.59 and 4,234.69

Step by Step Solution

1. Step 1: Write the proportion equation
   7,218.73 : 9,959.59 = 4,234.69 : x
2. Step 2: Convert to fraction form
   7,218.73/9,959.59 = 4,234.69/x
3. Step 3: Cross multiply
   7,218.73x = 9,959.59 × 4,234.69
4. Step 4: Simplify right side
   7,218.73x = 42,175,776.18
5. Step 5: Solve for x
   x = 42,175,776.18/7,218.73
6. Step 6: Final answer
   x = 5,842.55