Finding the Fourth Proportional to 12,912.20, 17,797.54 and 9,130.48

Step by Step Solution

1. Step 1: Write the proportion equation
   12,912.20 : 17,797.54 = 9,130.48 : x
2. Step 2: Convert to fraction form
   12,912.20/17,797.54 = 9,130.48/x
3. Step 3: Cross multiply
   12,912.20x = 17,797.54 × 9,130.48
4. Step 4: Simplify right side
   12,912.20x = 162,500,083.02
5. Step 5: Solve for x
   x = 162,500,083.02/12,912.20
6. Step 6: Final answer
   x = 12,585.00