Finding the Fourth Proportional to 21,608.48, 29,818.46 and 12,048.05

Step by Step Solution

1. Step 1: Write the proportion equation
   21,608.48 : 29,818.46 = 12,048.05 : x
2. Step 2: Convert to fraction form
   21,608.48/29,818.46 = 12,048.05/x
3. Step 3: Cross multiply
   21,608.48x = 29,818.46 × 12,048.05
4. Step 4: Simplify right side
   21,608.48x = 359,254,401.67
5. Step 5: Solve for x
   x = 359,254,401.67/21,608.48
6. Step 6: Final answer
   x = 16,625.62