Finding the Fourth Proportional to 9,980.15, 13,773.89 and 8,298.67

Step by Step Solution

1. Step 1: Write the proportion equation
   9,980.15 : 13,773.89 = 8,298.67 : x
2. Step 2: Convert to fraction form
   9,980.15/13,773.89 = 8,298.67/x
3. Step 3: Cross multiply
   9,980.15x = 13,773.89 × 8,298.67
4. Step 4: Simplify right side
   9,980.15x = 114,304,954.04
5. Step 5: Solve for x
   x = 114,304,954.04/9,980.15
6. Step 6: Final answer
   x = 11,453.23