Finding the Fourth Proportional to 12,729.34, 17,569.83 and 7,142.14

Step by Step Solution

1. Step 1: Write the proportion equation
   12,729.34 : 17,569.83 = 7,142.14 : x
2. Step 2: Convert to fraction form
   12,729.34/17,569.83 = 7,142.14/x
3. Step 3: Cross multiply
   12,729.34x = 17,569.83 × 7,142.14
4. Step 4: Simplify right side
   12,729.34x = 125,486,185.64
5. Step 5: Solve for x
   x = 125,486,185.64/12,729.34
6. Step 6: Final answer
   x = 9,858.03