Finding the Fourth Proportional to 9,380.82, 12,945.36 and 5,189.08

Step by Step Solution

1. Step 1: Write the proportion equation
   9,380.82 : 12,945.36 = 5,189.08 : x
2. Step 2: Convert to fraction form
   9,380.82/12,945.36 = 5,189.08/x
3. Step 3: Cross multiply
   9,380.82x = 12,945.36 × 5,189.08
4. Step 4: Simplify right side
   9,380.82x = 67,174,508.67
5. Step 5: Solve for x
   x = 67,174,508.67/9,380.82
6. Step 6: Final answer
   x = 7,160.84