Finding the Fourth Proportional to 9,278.72, 12,804.80 and 5,086.92

Step by Step Solution

1. Step 1: Write the proportion equation
   9,278.72 : 12,804.80 = 5,086.92 : x
2. Step 2: Convert to fraction form
   9,278.72/12,804.80 = 5,086.92/x
3. Step 3: Cross multiply
   9,278.72x = 12,804.80 × 5,086.92
4. Step 4: Simplify right side
   9,278.72x = 65,136,993.22
5. Step 5: Solve for x
   x = 65,136,993.22/9,278.72
6. Step 6: Final answer
   x = 7,020.04