Finding the Fourth Proportional to 28,870.38, 39,842.91 and 16,123.59

Step by Step Solution

1. Step 1: Write the proportion equation
   28,870.38 : 39,842.91 = 16,123.59 : x
2. Step 2: Convert to fraction form
   28,870.38/39,842.91 = 16,123.59/x
3. Step 3: Cross multiply
   28,870.38x = 39,842.91 × 16,123.59
4. Step 4: Simplify right side
   28,870.38x = 642,410,745.25
5. Step 5: Solve for x
   x = 642,410,745.25/28,870.38
6. Step 6: Final answer
   x = 22,251.55