Finding the Fourth Proportional to 8,918.72, 12,307.67 and 4,939.82

Step by Step Solution

1. Step 1: Write the proportion equation
   8,918.72 : 12,307.67 = 4,939.82 : x
2. Step 2: Convert to fraction form
   8,918.72/12,307.67 = 4,939.82/x
3. Step 3: Cross multiply
   8,918.72x = 12,307.67 × 4,939.82
4. Step 4: Simplify right side
   8,918.72x = 60,797,674.42
5. Step 5: Solve for x
   x = 60,797,674.42/8,918.72
6. Step 6: Final answer
   x = 6,816.86