Finding the Fourth Proportional to 9,042.20, 12,478.01 and 5,063.28

Step by Step Solution

1. Step 1: Write the proportion equation
   9,042.20 : 12,478.01 = 5,063.28 : x
2. Step 2: Convert to fraction form
   9,042.20/12,478.01 = 5,063.28/x
3. Step 3: Cross multiply
   9,042.20x = 12,478.01 × 5,063.28
4. Step 4: Simplify right side
   9,042.20x = 63,179,633.16
5. Step 5: Solve for x
   x = 63,179,633.16/9,042.20
6. Step 6: Final answer
   x = 6,987.20