Finding the Fourth Proportional to 12,718.51, 17,549.89 and 7,053.21

Step by Step Solution

1. Step 1: Write the proportion equation
   12,718.51 : 17,549.89 = 7,053.21 : x
2. Step 2: Convert to fraction form
   12,718.51/17,549.89 = 7,053.21/x
3. Step 3: Cross multiply
   12,718.51x = 17,549.89 × 7,053.21
4. Step 4: Simplify right side
   12,718.51x = 123,783,042.01
5. Step 5: Solve for x
   x = 123,783,042.01/12,718.51
6. Step 6: Final answer
   x = 9,732.51