Finding the Fourth Proportional to 12,732, 17,570.16 and 7,142.88

Step by Step Solution

1. Step 1: Write the proportion equation
   12,732 : 17,570.16 = 7,142.88 : x
2. Step 2: Convert to fraction form
   12,732/17,570.16 = 7,142.88/x
3. Step 3: Cross multiply
   12,732x = 17,570.16 × 7,142.88
4. Step 4: Simplify right side
   12,732x = 125,501,544.46
5. Step 5: Solve for x
   x = 125,501,544.46/12,732
6. Step 6: Final answer
   x = 9,857.17