Finding the Fourth Proportional to 8,199.69, 12,303.55 and 3,518.31

Step by Step Solution

1. Step 1: Write the proportion equation
   8,199.69 : 12,303.55 = 3,518.31 : x
2. Step 2: Convert to fraction form
   8,199.69/12,303.55 = 3,518.31/x
3. Step 3: Cross multiply
   8,199.69x = 12,303.55 × 3,518.31
4. Step 4: Simplify right side
   8,199.69x = 43,287,703.00
5. Step 5: Solve for x
   x = 43,287,703.00/8,199.69
6. Step 6: Final answer
   x = 5,279.19