Finding the Fourth Proportional to 10,928.43, 16,390.71 and 3,135.42

Step by Step Solution

1. Step 1: Write the proportion equation
   10,928.43 : 16,390.71 = 3,135.42 : x
2. Step 2: Convert to fraction form
   10,928.43/16,390.71 = 3,135.42/x
3. Step 3: Cross multiply
   10,928.43x = 16,390.71 × 3,135.42
4. Step 4: Simplify right side
   10,928.43x = 51,391,759.95
5. Step 5: Solve for x
   x = 51,391,759.95/10,928.43
6. Step 6: Final answer
   x = 4,702.57