Finding the Fourth Proportional to 8,018.17, 12,031.79 and 4,320.31

Step by Step Solution

1. Step 1: Write the proportion equation
   8,018.17 : 12,031.79 = 4,320.31 : x
2. Step 2: Convert to fraction form
   8,018.17/12,031.79 = 4,320.31/x
3. Step 3: Cross multiply
   8,018.17x = 12,031.79 × 4,320.31
4. Step 4: Simplify right side
   8,018.17x = 51,981,062.65
5. Step 5: Solve for x
   x = 51,981,062.65/8,018.17
6. Step 6: Final answer
   x = 6,482.91