Finding the Fourth Proportional to 28,681.34, 39,580.71 and 16,105.82

Step by Step Solution

1. Step 1: Write the proportion equation
   28,681.34 : 39,580.71 = 16,105.82 : x
2. Step 2: Convert to fraction form
   28,681.34/39,580.71 = 16,105.82/x
3. Step 3: Cross multiply
   28,681.34x = 39,580.71 × 16,105.82
4. Step 4: Simplify right side
   28,681.34x = 637,479,790.73
5. Step 5: Solve for x
   x = 637,479,790.73/28,681.34
6. Step 6: Final answer
   x = 22,226.29