Finding the Fourth Proportional to 9,042.72, 12,479.31 and 5,063.80

Step by Step Solution

1. Step 1: Write the proportion equation
   9,042.72 : 12,479.31 = 5,063.80 : x
2. Step 2: Convert to fraction form
   9,042.72/12,479.31 = 5,063.80/x
3. Step 3: Cross multiply
   9,042.72x = 12,479.31 × 5,063.80
4. Step 4: Simplify right side
   9,042.72x = 63,192,698.78
5. Step 5: Solve for x
   x = 63,192,698.78/9,042.72
6. Step 6: Final answer
   x = 6,988.24