Finding the Fourth Proportional to 21,617.69, 29,834.12 and 12,060.70

Step by Step Solution

1. Step 1: Write the proportion equation
   21,617.69 : 29,834.12 = 12,060.70 : x
2. Step 2: Convert to fraction form
   21,617.69/29,834.12 = 12,060.70/x
3. Step 3: Cross multiply
   21,617.69x = 29,834.12 × 12,060.70
4. Step 4: Simplify right side
   21,617.69x = 359,820,326.65
5. Step 5: Solve for x
   x = 359,820,326.65/21,617.69
6. Step 6: Final answer
   x = 16,644.72