Finding the Fourth Proportional to 9,042.96, 12,479.57 and 5,064.18

Step by Step Solution

1. Step 1: Write the proportion equation
   9,042.96 : 12,479.57 = 5,064.18 : x
2. Step 2: Convert to fraction form
   9,042.96/12,479.57 = 5,064.18/x
3. Step 3: Cross multiply
   9,042.96x = 12,479.57 × 5,064.18
4. Step 4: Simplify right side
   9,042.96x = 63,198,788.80
5. Step 5: Solve for x
   x = 63,198,788.80/9,042.96
6. Step 6: Final answer
   x = 6,988.73