Finding the Fourth Proportional to 21,046.51, 29,031.37 and 12,543.04

Step by Step Solution

1. Step 1: Write the proportion equation
   21,046.51 : 29,031.37 = 12,543.04 : x
2. Step 2: Convert to fraction form
   21,046.51/29,031.37 = 12,543.04/x
3. Step 3: Cross multiply
   21,046.51x = 29,031.37 × 12,543.04
4. Step 4: Simplify right side
   21,046.51x = 364,141,635.16
5. Step 5: Solve for x
   x = 364,141,635.16/21,046.51
6. Step 6: Final answer
   x = 17,301.76