Finding the Fourth Proportional to 28,698.52, 39,603.72 and 16,123

Step by Step Solution

1. Step 1: Write the proportion equation
   28,698.52 : 39,603.72 = 16,123 : x
2. Step 2: Convert to fraction form
   28,698.52/39,603.72 = 16,123/x
3. Step 3: Cross multiply
   28,698.52x = 39,603.72 × 16,123
4. Step 4: Simplify right side
   28,698.52x = 638,530,777.56
5. Step 5: Solve for x
   x = 638,530,777.56/28,698.52
6. Step 6: Final answer
   x = 22,249.61