Finding the Fourth Proportional to 10,080.18, 13,905.81 and 8,680.50

Step by Step Solution

1. Step 1: Write the proportion equation
   10,080.18 : 13,905.81 = 8,680.50 : x
2. Step 2: Convert to fraction form
   10,080.18/13,905.81 = 8,680.50/x
3. Step 3: Cross multiply
   10,080.18x = 13,905.81 × 8,680.50
4. Step 4: Simplify right side
   10,080.18x = 120,709,383.71
5. Step 5: Solve for x
   x = 120,709,383.71/10,080.18
6. Step 6: Final answer
   x = 11,974.92