Finding the Fourth Proportional to 12,422.81, 17,143.61 and 7,117.51

Step by Step Solution

1. Step 1: Write the proportion equation
   12,422.81 : 17,143.61 = 7,117.51 : x
2. Step 2: Convert to fraction form
   12,422.81/17,143.61 = 7,117.51/x
3. Step 3: Cross multiply
   12,422.81x = 17,143.61 × 7,117.51
4. Step 4: Simplify right side
   12,422.81x = 122,019,815.61
5. Step 5: Solve for x
   x = 122,019,815.61/12,422.81
6. Step 6: Final answer
   x = 9,822.24