Finding the Fourth Proportional to 12,791.28, 17,653.23 and 7,485.78

Step by Step Solution

1. Step 1: Write the proportion equation
   12,791.28 : 17,653.23 = 7,485.78 : x
2. Step 2: Convert to fraction form
   12,791.28/17,653.23 = 7,485.78/x
3. Step 3: Cross multiply
   12,791.28x = 17,653.23 × 7,485.78
4. Step 4: Simplify right side
   12,791.28x = 132,148,196.07
5. Step 5: Solve for x
   x = 132,148,196.07/12,791.28
6. Step 6: Final answer
   x = 10,331.12