Finding the Fourth Proportional to 9,977.82, 14,912.60 and 9,189.69

Step by Step Solution

1. Step 1: Write the proportion equation
   9,977.82 : 14,912.60 = 9,189.69 : x
2. Step 2: Convert to fraction form
   9,977.82/14,912.60 = 9,189.69/x
3. Step 3: Cross multiply
   9,977.82x = 14,912.60 × 9,189.69
4. Step 4: Simplify right side
   9,977.82x = 137,042,171.09
5. Step 5: Solve for x
   x = 137,042,171.09/9,977.82
6. Step 6: Final answer
   x = 13,734.68