Finding the Fourth Proportional to 12,513.27, 18,765.15 and 5,113.76

Step by Step Solution

1. Step 1: Write the proportion equation
   12,513.27 : 18,765.15 = 5,113.76 : x
2. Step 2: Convert to fraction form
   12,513.27/18,765.15 = 5,113.76/x
3. Step 3: Cross multiply
   12,513.27x = 18,765.15 × 5,113.76
4. Step 4: Simplify right side
   12,513.27x = 95,960,473.46
5. Step 5: Solve for x
   x = 95,960,473.46/12,513.27
6. Step 6: Final answer
   x = 7,668.70