Finding the Fourth Proportional to 12,290.60, 16,960.23 and 7,256.36

Step by Step Solution

1. Step 1: Write the proportion equation
   12,290.60 : 16,960.23 = 7,256.36 : x
2. Step 2: Convert to fraction form
   12,290.60/16,960.23 = 7,256.36/x
3. Step 3: Cross multiply
   12,290.60x = 16,960.23 × 7,256.36
4. Step 4: Simplify right side
   12,290.60x = 123,069,534.56
5. Step 5: Solve for x
   x = 123,069,534.56/12,290.60
6. Step 6: Final answer
   x = 10,013.31