Finding the Fourth Proportional to 9,042.22, 12,478.62 and 5,063.30

Step by Step Solution

1. Step 1: Write the proportion equation
   9,042.22 : 12,478.62 = 5,063.30 : x
2. Step 2: Convert to fraction form
   9,042.22/12,478.62 = 5,063.30/x
3. Step 3: Cross multiply
   9,042.22x = 12,478.62 × 5,063.30
4. Step 4: Simplify right side
   9,042.22x = 63,182,996.65
5. Step 5: Solve for x
   x = 63,182,996.65/9,042.22
6. Step 6: Final answer
   x = 6,987.55