Finding the Fourth Proportional to 21,614.62, 29,830.59 and 12,669.69

Step by Step Solution

1. Step 1: Write the proportion equation
   21,614.62 : 29,830.59 = 12,669.69 : x
2. Step 2: Convert to fraction form
   21,614.62/29,830.59 = 12,669.69/x
3. Step 3: Cross multiply
   21,614.62x = 29,830.59 × 12,669.69
4. Step 4: Simplify right side
   21,614.62x = 377,944,264.47
5. Step 5: Solve for x
   x = 377,944,264.47/21,614.62
6. Step 6: Final answer
   x = 17,485.59