Finding the Fourth Proportional to 12,980.58, 17,914.86 and 8,508.12

Step by Step Solution

1. Step 1: Write the proportion equation
   12,980.58 : 17,914.86 = 8,508.12 : x
2. Step 2: Convert to fraction form
   12,980.58/17,914.86 = 8,508.12/x
3. Step 3: Cross multiply
   12,980.58x = 17,914.86 × 8,508.12
4. Step 4: Simplify right side
   12,980.58x = 152,421,778.66
5. Step 5: Solve for x
   x = 152,421,778.66/12,980.58
6. Step 6: Final answer
   x = 11,742.29