Finding the Fourth Proportional to 28,357.56, 39,142.04 and 16,423.83

Step by Step Solution

1. Step 1: Write the proportion equation
   28,357.56 : 39,142.04 = 16,423.83 : x
2. Step 2: Convert to fraction form
   28,357.56/39,142.04 = 16,423.83/x
3. Step 3: Cross multiply
   28,357.56x = 39,142.04 × 16,423.83
4. Step 4: Simplify right side
   28,357.56x = 642,862,128.69
5. Step 5: Solve for x
   x = 642,862,128.69/28,357.56
6. Step 6: Final answer
   x = 22,669.87