Finding the Fourth Proportional to 11,290.20, 15,572.70 and 7,940.04

Step by Step Solution

1. Step 1: Write the proportion equation
   11,290.20 : 15,572.70 = 7,940.04 : x
2. Step 2: Convert to fraction form
   11,290.20/15,572.70 = 7,940.04/x
3. Step 3: Cross multiply
   11,290.20x = 15,572.70 × 7,940.04
4. Step 4: Simplify right side
   11,290.20x = 123,647,860.91
5. Step 5: Solve for x
   x = 123,647,860.91/11,290.20
6. Step 6: Final answer
   x = 10,951.79