Finding the Fourth Proportional to 12,857.72, 17,743.56 and 7,192.44

Step by Step Solution

1. Step 1: Write the proportion equation
   12,857.72 : 17,743.56 = 7,192.44 : x
2. Step 2: Convert to fraction form
   12,857.72/17,743.56 = 7,192.44/x
3. Step 3: Cross multiply
   12,857.72x = 17,743.56 × 7,192.44
4. Step 4: Simplify right side
   12,857.72x = 127,619,463.71
5. Step 5: Solve for x
   x = 127,619,463.71/12,857.72
6. Step 6: Final answer
   x = 9,925.52