Finding the Fourth Proportional to 12,940.57, 17,858.62 and 7,277.10

Step by Step Solution

1. Step 1: Write the proportion equation
   12,940.57 : 17,858.62 = 7,277.10 : x
2. Step 2: Convert to fraction form
   12,940.57/17,858.62 = 7,277.10/x
3. Step 3: Cross multiply
   12,940.57x = 17,858.62 × 7,277.10
4. Step 4: Simplify right side
   12,940.57x = 129,958,963.60
5. Step 5: Solve for x
   x = 129,958,963.60/12,940.57
6. Step 6: Final answer
   x = 10,042.75