Finding the Fourth Proportional to 21,648.02, 29,871.98 and 12,571.61

Step by Step Solution

1. Step 1: Write the proportion equation
   21,648.02 : 29,871.98 = 12,571.61 : x
2. Step 2: Convert to fraction form
   21,648.02/29,871.98 = 12,571.61/x
3. Step 3: Cross multiply
   21,648.02x = 29,871.98 × 12,571.61
4. Step 4: Simplify right side
   21,648.02x = 375,538,739.51
5. Step 5: Solve for x
   x = 375,538,739.51/21,648.02
6. Step 6: Final answer
   x = 17,347.49