Finding the Fourth Proportional to 16,490.59, 22,767.35 and 12,706.57

Step by Step Solution

1. Step 1: Write the proportion equation
   16,490.59 : 22,767.35 = 12,706.57 : x
2. Step 2: Convert to fraction form
   16,490.59/22,767.35 = 12,706.57/x
3. Step 3: Cross multiply
   16,490.59x = 22,767.35 × 12,706.57
4. Step 4: Simplify right side
   16,490.59x = 289,294,891.42
5. Step 5: Solve for x
   x = 289,294,891.42/16,490.59
6. Step 6: Final answer
   x = 17,543.03