Finding the Fourth Proportional to 8,313.79, 12,462.48 and 3,386.89

Step by Step Solution

1. Step 1: Write the proportion equation
   8,313.79 : 12,462.48 = 3,386.89 : x
2. Step 2: Convert to fraction form
   8,313.79/12,462.48 = 3,386.89/x
3. Step 3: Cross multiply
   8,313.79x = 12,462.48 × 3,386.89
4. Step 4: Simplify right side
   8,313.79x = 42,209,038.94
5. Step 5: Solve for x
   x = 42,209,038.94/8,313.79
6. Step 6: Final answer
   x = 5,076.99