Finding the Fourth Proportional to 7,243.88, 9,996.82 and 4,218.78

Step by Step Solution

1. Step 1: Write the proportion equation
   7,243.88 : 9,996.82 = 4,218.78 : x
2. Step 2: Convert to fraction form
   7,243.88/9,996.82 = 4,218.78/x
3. Step 3: Cross multiply
   7,243.88x = 9,996.82 × 4,218.78
4. Step 4: Simplify right side
   7,243.88x = 42,174,411.22
5. Step 5: Solve for x
   x = 42,174,411.22/7,243.88
6. Step 6: Final answer
   x = 5,822.07