Finding the Fourth Proportional to 9,278.52, 12,804.32 and 5,086.76

Step by Step Solution

1. Step 1: Write the proportion equation
   9,278.52 : 12,804.32 = 5,086.76 : x
2. Step 2: Convert to fraction form
   9,278.52/12,804.32 = 5,086.76/x
3. Step 3: Cross multiply
   9,278.52x = 12,804.32 × 5,086.76
4. Step 4: Simplify right side
   9,278.52x = 65,132,502.80
5. Step 5: Solve for x
   x = 65,132,502.80/9,278.52
6. Step 6: Final answer
   x = 7,019.71