Finding the Fourth Proportional to 28,648, 39,535.46 and 16,072.75

Step by Step Solution

1. Step 1: Write the proportion equation
   28,648 : 39,535.46 = 16,072.75 : x
2. Step 2: Convert to fraction form
   28,648/39,535.46 = 16,072.75/x
3. Step 3: Cross multiply
   28,648x = 39,535.46 × 16,072.75
4. Step 4: Simplify right side
   28,648x = 635,443,564.72
5. Step 5: Solve for x
   x = 635,443,564.72/28,648
6. Step 6: Final answer
   x = 22,181.08