Finding the Fourth Proportional to 16,907.40, 25,365.42 and 5,220.72

Step by Step Solution

1. Step 1: Write the proportion equation
   16,907.40 : 25,365.42 = 5,220.72 : x
2. Step 2: Convert to fraction form
   16,907.40/25,365.42 = 5,220.72/x
3. Step 3: Cross multiply
   16,907.40x = 25,365.42 × 5,220.72
4. Step 4: Simplify right side
   16,907.40x = 132,425,755.50
5. Step 5: Solve for x
   x = 132,425,755.50/16,907.40
6. Step 6: Final answer
   x = 7,832.41