Finding the Fourth Proportional to 18,279.48, 25,185.57 and 12,300.77

Step by Step Solution

1. Step 1: Write the proportion equation
   18,279.48 : 25,185.57 = 12,300.77 : x
2. Step 2: Convert to fraction form
   18,279.48/25,185.57 = 12,300.77/x
3. Step 3: Cross multiply
   18,279.48x = 25,185.57 × 12,300.77
4. Step 4: Simplify right side
   18,279.48x = 309,801,903.89
5. Step 5: Solve for x
   x = 309,801,903.89/18,279.48
6. Step 6: Final answer
   x = 16,948.07