Finding the Fourth Proportional to 16,115.43, 22,213.59 and 12,706.86

Step by Step Solution

1. Step 1: Write the proportion equation
   16,115.43 : 22,213.59 = 12,706.86 : x
2. Step 2: Convert to fraction form
   16,115.43/22,213.59 = 12,706.86/x
3. Step 3: Cross multiply
   16,115.43x = 22,213.59 × 12,706.86
4. Step 4: Simplify right side
   16,115.43x = 282,264,978.23
5. Step 5: Solve for x
   x = 282,264,978.23/16,115.43
6. Step 6: Final answer
   x = 17,515.20