Finding the Fourth Proportional to 12,629.98, 17,430.55 and 7,040.86

Step by Step Solution

1. Step 1: Write the proportion equation
   12,629.98 : 17,430.55 = 7,040.86 : x
2. Step 2: Convert to fraction form
   12,629.98/17,430.55 = 7,040.86/x
3. Step 3: Cross multiply
   12,629.98x = 17,430.55 × 7,040.86
4. Step 4: Simplify right side
   12,629.98x = 122,726,062.27
5. Step 5: Solve for x
   x = 122,726,062.27/12,629.98
6. Step 6: Final answer
   x = 9,717.04