Finding the Fourth Proportional to 9,193.05, 12,687.73 and 5,160.31

Step by Step Solution

1. Step 1: Write the proportion equation
   9,193.05 : 12,687.73 = 5,160.31 : x
2. Step 2: Convert to fraction form
   9,193.05/12,687.73 = 5,160.31/x
3. Step 3: Cross multiply
   9,193.05x = 12,687.73 × 5,160.31
4. Step 4: Simplify right side
   9,193.05x = 65,472,620.00
5. Step 5: Solve for x
   x = 65,472,620.00/9,193.05
6. Step 6: Final answer
   x = 7,121.97