Finding the Fourth Proportional to 9,327.68, 12,871.78 and 5,078.76

Step by Step Solution

1. Step 1: Write the proportion equation
   9,327.68 : 12,871.78 = 5,078.76 : x
2. Step 2: Convert to fraction form
   9,327.68/12,871.78 = 5,078.76/x
3. Step 3: Cross multiply
   9,327.68x = 12,871.78 × 5,078.76
4. Step 4: Simplify right side
   9,327.68x = 65,372,681.39
5. Step 5: Solve for x
   x = 65,372,681.39/9,327.68
6. Step 6: Final answer
   x = 7,008.46