Finding the Fourth Proportional to 8,779.98, 12,131.82 and 6,508.05

Step by Step Solution

1. Step 1: Write the proportion equation
   8,779.98 : 12,131.82 = 6,508.05 : x
2. Step 2: Convert to fraction form
   8,779.98/12,131.82 = 6,508.05/x
3. Step 3: Cross multiply
   8,779.98x = 12,131.82 × 6,508.05
4. Step 4: Simplify right side
   8,779.98x = 78,954,491.15
5. Step 5: Solve for x
   x = 78,954,491.15/8,779.98
6. Step 6: Final answer
   x = 8,992.56