Finding the Fourth Proportional to 12,903.78, 19,363.89 and 5,508.30

Step by Step Solution

1. Step 1: Write the proportion equation
   12,903.78 : 19,363.89 = 5,508.30 : x
2. Step 2: Convert to fraction form
   12,903.78/19,363.89 = 5,508.30/x
3. Step 3: Cross multiply
   12,903.78x = 19,363.89 × 5,508.30
4. Step 4: Simplify right side
   12,903.78x = 106,662,162.08
5. Step 5: Solve for x
   x = 106,662,162.08/12,903.78
6. Step 6: Final answer
   x = 8,265.96