Finding the Fourth Proportional to 28,559.30, 39,411.83 and 15,984.05

Step by Step Solution

1. Step 1: Write the proportion equation
   28,559.30 : 39,411.83 = 15,984.05 : x
2. Step 2: Convert to fraction form
   28,559.30/39,411.83 = 15,984.05/x
3. Step 3: Cross multiply
   28,559.30x = 39,411.83 × 15,984.05
4. Step 4: Simplify right side
   28,559.30x = 629,960,799.80
5. Step 5: Solve for x
   x = 629,960,799.80/28,559.30
6. Step 6: Final answer
   x = 22,057.99