Finding the Fourth Proportional to 21,172.83, 29,145.17 and 18,300.24

Step by Step Solution

1. Step 1: Write the proportion equation
   21,172.83 : 29,145.17 = 18,300.24 : x
2. Step 2: Convert to fraction form
   21,172.83/29,145.17 = 18,300.24/x
3. Step 3: Cross multiply
   21,172.83x = 29,145.17 × 18,300.24
4. Step 4: Simplify right side
   21,172.83x = 533,363,514.34
5. Step 5: Solve for x
   x = 533,363,514.34/21,172.83
6. Step 6: Final answer
   x = 25,190.94