Finding the Fourth Proportional to 12,508.92, 18,747.72 and 5,109.30

Step by Step Solution

1. Step 1: Write the proportion equation
   12,508.92 : 18,747.72 = 5,109.30 : x
2. Step 2: Convert to fraction form
   12,508.92/18,747.72 = 5,109.30/x
3. Step 3: Cross multiply
   12,508.92x = 18,747.72 × 5,109.30
4. Step 4: Simplify right side
   12,508.92x = 95,787,725.80
5. Step 5: Solve for x
   x = 95,787,725.80/12,508.92
6. Step 6: Final answer
   x = 7,657.55