Finding the Fourth Proportional to 11,426.38, 17,145.24 and 7,720.48

Step by Step Solution

1. Step 1: Write the proportion equation
   11,426.38 : 17,145.24 = 7,720.48 : x
2. Step 2: Convert to fraction form
   11,426.38/17,145.24 = 7,720.48/x
3. Step 3: Cross multiply
   11,426.38x = 17,145.24 × 7,720.48
4. Step 4: Simplify right side
   11,426.38x = 132,369,482.52
5. Step 5: Solve for x
   x = 132,369,482.52/11,426.38
6. Step 6: Final answer
   x = 11,584.55