Finding the Fourth Proportional to 12,422.87, 17,143.03 and 7,118.18

Step by Step Solution

1. Step 1: Write the proportion equation
   12,422.87 : 17,143.03 = 7,118.18 : x
2. Step 2: Convert to fraction form
   12,422.87/17,143.03 = 7,118.18/x
3. Step 3: Cross multiply
   12,422.87x = 17,143.03 × 7,118.18
4. Step 4: Simplify right side
   12,422.87x = 122,027,173.29
5. Step 5: Solve for x
   x = 122,027,173.29/12,422.87
6. Step 6: Final answer
   x = 9,822.78