Finding the Fourth Proportional to 12,914.83, 19,379.54 and 5,518.72

Step by Step Solution

1. Step 1: Write the proportion equation
   12,914.83 : 19,379.54 = 5,518.72 : x
2. Step 2: Convert to fraction form
   12,914.83/19,379.54 = 5,518.72/x
3. Step 3: Cross multiply
   12,914.83x = 19,379.54 × 5,518.72
4. Step 4: Simplify right side
   12,914.83x = 106,950,254.99
5. Step 5: Solve for x
   x = 106,950,254.99/12,914.83
6. Step 6: Final answer
   x = 8,281.20