Finding the Fourth Proportional to 16,805.35, 25,200.72 and 5,115.83

Step by Step Solution

1. Step 1: Write the proportion equation
   16,805.35 : 25,200.72 = 5,115.83 : x
2. Step 2: Convert to fraction form
   16,805.35/25,200.72 = 5,115.83/x
3. Step 3: Cross multiply
   16,805.35x = 25,200.72 × 5,115.83
4. Step 4: Simplify right side
   16,805.35x = 128,922,599.40
5. Step 5: Solve for x
   x = 128,922,599.40/16,805.35
6. Step 6: Final answer
   x = 7,671.52