Finding the Fourth Proportional to 9,309.78, 12,847.23 and 5,118.03

Step by Step Solution

1. Step 1: Write the proportion equation
   9,309.78 : 12,847.23 = 5,118.03 : x
2. Step 2: Convert to fraction form
   9,309.78/12,847.23 = 5,118.03/x
3. Step 3: Cross multiply
   9,309.78x = 12,847.23 × 5,118.03
4. Step 4: Simplify right side
   9,309.78x = 65,752,508.56
5. Step 5: Solve for x
   x = 65,752,508.56/9,309.78
6. Step 6: Final answer
   x = 7,062.73