Finding the Fourth Proportional to 9,380.92, 12,945.72 and 5,189.17

Step by Step Solution

1. Step 1: Write the proportion equation
   9,380.92 : 12,945.72 = 5,189.17 : x
2. Step 2: Convert to fraction form
   9,380.92/12,945.72 = 5,189.17/x
3. Step 3: Cross multiply
   9,380.92x = 12,945.72 × 5,189.17
4. Step 4: Simplify right side
   9,380.92x = 67,177,541.85
5. Step 5: Solve for x
   x = 67,177,541.85/9,380.92
6. Step 6: Final answer
   x = 7,161.08