Finding the Fourth Proportional to 8,308.77, 12,463.34 and 3,111.81

Step by Step Solution

1. Step 1: Write the proportion equation
   8,308.77 : 12,463.34 = 3,111.81 : x
2. Step 2: Convert to fraction form
   8,308.77/12,463.34 = 3,111.81/x
3. Step 3: Cross multiply
   8,308.77x = 12,463.34 × 3,111.81
4. Step 4: Simplify right side
   8,308.77x = 38,783,530.49
5. Step 5: Solve for x
   x = 38,783,530.49/8,308.77
6. Step 6: Final answer
   x = 4,667.78