Finding the Fourth Proportional to 12,857.39, 17,744.84 and 7,192.45

Step by Step Solution

1. Step 1: Write the proportion equation
   12,857.39 : 17,744.84 = 7,192.45 : x
2. Step 2: Convert to fraction form
   12,857.39/17,744.84 = 7,192.45/x
3. Step 3: Cross multiply
   12,857.39x = 17,744.84 × 7,192.45
4. Step 4: Simplify right side
   12,857.39x = 127,628,909.83
5. Step 5: Solve for x
   x = 127,628,909.83/12,857.39
6. Step 6: Final answer
   x = 9,926.50