Finding the Fourth Proportional to 21,583.86, 29,786.31 and 12,152.76

Step by Step Solution

1. Step 1: Write the proportion equation
   21,583.86 : 29,786.31 = 12,152.76 : x
2. Step 2: Convert to fraction form
   21,583.86/29,786.31 = 12,152.76/x
3. Step 3: Cross multiply
   21,583.86x = 29,786.31 × 12,152.76
4. Step 4: Simplify right side
   21,583.86x = 361,985,876.72
5. Step 5: Solve for x
   x = 361,985,876.72/21,583.86
6. Step 6: Final answer
   x = 16,771.14