Finding the Fourth Proportional to 12,957.05, 17,880.31 and 7,292.12

Step by Step Solution

1. Step 1: Write the proportion equation
   12,957.05 : 17,880.31 = 7,292.12 : x
2. Step 2: Convert to fraction form
   12,957.05/17,880.31 = 7,292.12/x
3. Step 3: Cross multiply
   12,957.05x = 17,880.31 × 7,292.12
4. Step 4: Simplify right side
   12,957.05x = 130,385,366.16
5. Step 5: Solve for x
   x = 130,385,366.16/12,957.05
6. Step 6: Final answer
   x = 10,062.89